diff --git a/ash/ash.gyp b/ash/ash.gyp
index 3592dbbeee5e01..1cd7748532d7b2 100644
--- a/ash/ash.gyp
+++ b/ash/ash.gyp
@@ -1063,8 +1063,7 @@
             ['exclude', 'display/resolution_notification_controller_unittest.cc'],
           ],
         }],
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and component=="shared_library" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and component=="shared_library" and use_allocator!="none"', {
           'dependencies': [
             '<(DEPTH)/base/allocator/allocator.gyp:allocator',
           ],
diff --git a/base/base.gyp b/base/base.gyp
index e8b7d305ba4c1c..85f0a947db2bcb 100644
--- a/base/base.gyp
+++ b/base/base.gyp
@@ -143,8 +143,7 @@
             ],
           },
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['use_allocator!="tcmalloc" and (use_allocator!="see_use_tcmalloc" or linux_use_tcmalloc==0)', {
+            ['use_allocator!="tcmalloc"', {
               'defines': [
                 'NO_TCMALLOC',
               ],
@@ -700,8 +699,7 @@
             'message_loop/message_pump_glib_unittest.cc',
           ]
         }],
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS == "linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS == "linux" and use_allocator!="none"', {
             'dependencies': [
               'allocator/allocator.gyp:allocator',
             ],
diff --git a/build/common.gypi b/build/common.gypi
index efb80636622667..def3eaf76e2355 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -820,10 +820,7 @@
 
         ['OS=="linux" and target_arch=="arm" and chromeos==0', {
           # Set some defaults for arm/linux chrome builds
-          # TODO(dmikurube): Change the default of use_allocator to "none".
-          # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-          'linux_use_tcmalloc%': 0,
-          'use_allocator%': 'see_use_tcmalloc',
+          'use_allocator%': 'none',
           # sysroot needs to be an absolute path otherwise it generates
           # incorrect results when passed to pkg-config
           'sysroot%': '<!(cd <(DEPTH) && pwd -P)/arm-sysroot',
@@ -1222,15 +1219,8 @@
     'binutils_dir%': '',
 
     # Enable TCMalloc.
-    # TODO(dmikurube): Change Linux default of use_allocator to "tcmalloc".
-    # TODO(dmikurube): Change Android default of use_allocator to "none".
-    # TODO(dmikurube): Kill {linux|android}_use_tcmalloc. http://crbug.com/345554
-    # {linux|android}_use_tcmalloc are to be replaced with use_allocator.
-    # They are now used only if use_allocator=="see_use_tcmalloc" (default).
-    # TODO(dmikurube): Assert when {linux|android}_use_tcmalloc is explicitly specified.
-    'linux_use_tcmalloc%': 1,
-    'android_use_tcmalloc%': 0,
-    'use_allocator%': 'see_use_tcmalloc',
+    # Default of 'use_allocator' is set to 'none' if OS=='android' later.
+    'use_allocator%': 'tcmalloc',
 
     # Set to 1 to link against libgnome-keyring instead of using dlopen().
     'linux_link_gnome_keyring%': 0,
@@ -1460,10 +1450,7 @@
             'werror%': '',
             'disable_nacl%': 1,
             'nacl_untrusted_build%': 0,
-            # TODO(dmikurube): Change the default of use_allocator to "none".
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            'linux_use_tcmalloc%': 0,
-            'use_allocator%': 'see_use_tcmalloc',
+            'use_allocator%': 'none',
           }],
           ['OS=="linux" and target_arch=="mipsel"', {
             'sysroot%': '<(sysroot)',
@@ -1650,10 +1637,7 @@
         'input_speech%': 0,
         'java_bridge%': 1,
         'build_ffmpegsumo%': 0,
-        # TODO(dmikurube): Change the default of use_allocator to "none".
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        'linux_use_tcmalloc%': 0,
-        'use_allocator%': 'see_use_tcmalloc',
+        'use_allocator%': 'none',
 
         # Disable Native Client.
         'disable_nacl%': 1,
@@ -2043,10 +2027,7 @@
         'win_release_InlineFunctionExpansion': '0',
         'win_release_OmitFramePointers': '0',
 
-        # TODO(dmikurube): Change the default of use_allocator to "tcmalloc".
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        'linux_use_tcmalloc%': 1,
-        'use_allocator': 'see_use_tcmalloc',
+        'use_allocator': 'tcmalloc',
         'release_valgrind_build': 1,
         'werror': '',
         'component': 'static_library',
@@ -2299,8 +2280,7 @@
           '<(DEPTH)/build/mac/asan.gyp:asan_dynamic_runtime',
         ],
       }],
-      # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-      ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)) and clang_type_profiler==1', {
+      ['OS=="linux" and use_allocator!="none" and clang_type_profiler==1', {
         'cflags_cc!': ['-fno-rtti'],
         'cflags_cc+': [
           '-frtti',
@@ -3865,8 +3845,7 @@
               }],
             ],
           }],
-          # TODO(dmikurube): Kill {linux|android}_use_tcmalloc. http://crbug.com/345554
-          ['use_allocator!="tcmalloc" and (use_allocator!="see_use_tcmalloc" or ((OS=="linux" and linux_use_tcmalloc==0) or (OS=="android" and android_use_tcmalloc==0)))', {
+          ['use_allocator!="tcmalloc"', {
             'defines': ['NO_TCMALLOC'],
           }],
           ['linux_use_gold_flags==1', {
diff --git a/build/gyp_chromium b/build/gyp_chromium
index 201e5a0fa753a3..26028dc2c4a1ff 100755
--- a/build/gyp_chromium
+++ b/build/gyp_chromium
@@ -277,6 +277,17 @@ if __name__ == '__main__':
   supplemental_includes = GetSupplementalFiles()
   gyp_vars_dict = GetGypVars(supplemental_includes)
 
+  # TODO(dmikurube): Remove these checks and messages after a while.
+  if ('linux_use_tcmalloc' in gyp_vars_dict or
+      'android_use_tcmalloc' in gyp_vars_dict):
+    print '*****************************************************************'
+    print '"linux_use_tcmalloc" and "android_use_tcmalloc" are deprecated!'
+    print '-----------------------------------------------------------------'
+    print 'You specify "linux_use_tcmalloc" or "android_use_tcmalloc" in'
+    print 'your GYP_DEFINES. Please switch them into "use_allocator" now.'
+    print 'See http://crbug.com/345554 for the details.'
+    print '*****************************************************************'
+
   # Automatically turn on crosscompile support for platforms that need it.
   # (The Chrome OS build sets CC_host / CC_target which implicitly enables
   # this mode.)
diff --git a/cc/cc_tests.gyp b/cc/cc_tests.gyp
index be7145eeb49328..25fb7606924ac4 100644
--- a/cc/cc_tests.gyp
+++ b/cc/cc_tests.gyp
@@ -268,8 +268,7 @@
         [ 'os_posix == 1 and OS != "mac" and OS != "android" and OS != "ios"',
           {
             'conditions': [
-              # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-              [ '(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)',
+              [ 'use_allocator!="none"',
                 {
                   'dependencies': [
                     '../base/allocator/allocator.gyp:allocator',
@@ -328,8 +327,7 @@
           }
         ],
         # See http://crbug.com/162998#c4 for why this is needed.
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))',
+        ['OS=="linux" and use_allocator!="none"',
           {
             'dependencies': [
               '../base/allocator/allocator.gyp:allocator',
diff --git a/chrome/chrome_android.gypi b/chrome/chrome_android.gypi
index 00a3af2ad8ab8e..8ba1f24166690d 100644
--- a/chrome/chrome_android.gypi
+++ b/chrome/chrome_android.gypi
@@ -39,8 +39,7 @@
             }],
           ],
         }],
-        # TODO(dmikurube): Kill android_use_tcmalloc. http://crbug.com/345554
-        [ '(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and android_use_tcmalloc==1)', {
+        [ 'use_allocator!="none"', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator', ],
         }],
diff --git a/chrome/chrome_exe.gypi b/chrome/chrome_exe.gypi
index 7e1e83f9c7f793..b7a23b1ecabf45 100644
--- a/chrome/chrome_exe.gypi
+++ b/chrome/chrome_exe.gypi
@@ -141,8 +141,7 @@
             },
           ],
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
                 'dependencies': [
                   '<(allocator_target)',
                 ],
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 9b94b27f15d842..c0a0d440d309c3 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -1875,8 +1875,7 @@
         }],
         ['os_posix == 1 and OS != "mac" and OS != "android"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
@@ -2148,8 +2147,7 @@
         }],
         ['os_posix == 1 and OS != "mac" and OS != "android"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
@@ -2659,8 +2657,7 @@
             }],
             ['os_posix == 1 and OS != "mac" and OS != "android"', {
               'conditions': [
-                # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-                ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+                ['use_allocator!="none"', {
                   'dependencies': [
                     '../base/allocator/allocator.gyp:allocator',
                   ],
diff --git a/chrome/chrome_tests_unit.gypi b/chrome/chrome_tests_unit.gypi
index 4066c4e3964f71..f8b3b81012285d 100644
--- a/chrome/chrome_tests_unit.gypi
+++ b/chrome/chrome_tests_unit.gypi
@@ -2349,8 +2349,7 @@
         }],
         ['os_posix == 1 and OS != "mac" and OS != "ios" and OS != "android"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
diff --git a/chromeos/chromeos.gyp b/chromeos/chromeos.gyp
index 8ab802a5015225..e2e332a56ec2a2 100644
--- a/chromeos/chromeos.gyp
+++ b/chromeos/chromeos.gyp
@@ -547,8 +547,7 @@
         '..',
       ],
       'conditions': [
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        [ '(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+        [ 'use_allocator!="none"', {
            'dependencies': [
               '../base/allocator/allocator.gyp:allocator',
             ],
diff --git a/cloud_print/cloud_print.gyp b/cloud_print/cloud_print.gyp
index feb8311c497a6b..e54dc86ff2ae84 100644
--- a/cloud_print/cloud_print.gyp
+++ b/cloud_print/cloud_print.gyp
@@ -52,8 +52,7 @@
           ],
         }],
         # See http://crbug.com/162998#c4 for why this is needed.
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
diff --git a/components/components_tests.gyp b/components/components_tests.gyp
index 77be27280582bc..6875cec05aa808 100644
--- a/components/components_tests.gyp
+++ b/components/components_tests.gyp
@@ -445,8 +445,7 @@
                 '../base/allocator/allocator.gyp:allocator',
               ],
             }],
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['OS=="linux" and component=="shared_library" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+            ['OS=="linux" and component=="shared_library" and use_allocator!="none"', {
             'dependencies': [
                 '<(DEPTH)/base/allocator/allocator.gyp:allocator',
             ],
diff --git a/components/nacl.gyp b/components/nacl.gyp
index 2c70b7d9c35cb0..7b3b096539ce68 100644
--- a/components/nacl.gyp
+++ b/components/nacl.gyp
@@ -307,8 +307,7 @@
                 }],
                 ['os_posix == 1 and OS != "mac"', {
                   'conditions': [
-                    # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-                    ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+                    ['use_allocator!="none"', {
                       'dependencies': [
                         '../base/allocator/allocator.gyp:allocator',
                       ],
diff --git a/content/content_app.gypi b/content/content_app.gypi
index 4d1031726ac842..0a873a4cfa38cc 100644
--- a/content/content_app.gypi
+++ b/content/content_app.gypi
@@ -35,8 +35,7 @@
     'public/app/startup_helper_win.h',
   ],
   'conditions': [
-    # TODO(dmikurube): Kill {linux|android}_use_tcmalloc. http://crbug.com/345554
-    ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and ((OS=="linux" and os_posix==1 and use_aura==1 and linux_use_tcmalloc==1) or (OS=="android" and android_use_tcmalloc==1)))', {
+    ['((OS=="linux" and os_posix==1 and use_aura==1) or OS=="android") and use_allocator!="none"', {
       'dependencies': [
         # This is needed by app/content_main_runner.cc
         '../base/allocator/allocator.gyp:allocator',
diff --git a/content/content_shell.gypi b/content/content_shell.gypi
index bb385ae3d5a74d..3b14649f140972 100644
--- a/content/content_shell.gypi
+++ b/content/content_shell.gypi
@@ -299,8 +299,7 @@
             '../components/components.gyp:breakpad_host',
           ],
         }],
-        # TODO(dmikurube): Kill {linux|android}_use_tcmalloc. http://crbug.com/345554
-        ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and ((OS=="linux" and linux_use_tcmalloc==1) or (OS=="android" and android_use_tcmalloc==1)))', {
+        ['(OS=="linux" or OS=="android") and use_allocator!="none"', {
           'dependencies': [
             # This is needed by content/app/content_main_runner.cc
             '../base/allocator/allocator.gyp:allocator',
diff --git a/content/content_tests.gypi b/content/content_tests.gypi
index 2f29ec3901d1ff..3f7c94b406ed0c 100644
--- a/content/content_tests.gypi
+++ b/content/content_tests.gypi
@@ -1411,10 +1411,9 @@
                   '<(angle_path)/src/build_angle.gyp:libGLESv2',
                 ],
               }],
-              # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
               ['(OS=="win" and win_use_allocator_shim==1) or '
                '(os_posix == 1 and OS != "android" and '
-               ' ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)))', {
+               ' use_allocator!="none")', {
                 'dependencies': [
                   '../base/allocator/allocator.gyp:allocator',
                 ],
diff --git a/courgette/courgette.gyp b/courgette/courgette.gyp
index 00c20887791906..52db0fbf4320e9 100644
--- a/courgette/courgette.gyp
+++ b/courgette/courgette.gyp
@@ -121,8 +121,7 @@
       'conditions': [
         [ 'os_posix == 1 and OS != "mac" and OS != "android" and OS != "ios"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
diff --git a/crypto/crypto.gyp b/crypto/crypto.gyp
index e43f976e3e9789..ec1e2782a1a358 100644
--- a/crypto/crypto.gyp
+++ b/crypto/crypto.gyp
@@ -180,8 +180,7 @@
       'conditions': [
         [ 'os_posix == 1 and OS != "mac" and OS != "android" and OS != "ios"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            [ '(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            [ 'use_allocator!="none"', {
                 'dependencies': [
                   '../base/allocator/allocator.gyp:allocator',
                 ],
diff --git a/device/device_tests.gyp b/device/device_tests.gyp
index b28f475b8367f4..46c8f3d12e7ed7 100644
--- a/device/device_tests.gyp
+++ b/device/device_tests.gyp
@@ -59,8 +59,7 @@
         }],
         ['os_posix == 1 and OS != "mac" and OS != "android" and OS != "ios"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
diff --git a/gpu/gles2_conform_support/gles2_conform_support.gyp b/gpu/gles2_conform_support/gles2_conform_support.gyp
index d34996e7f8d178..92af9d936ffb28 100644
--- a/gpu/gles2_conform_support/gles2_conform_support.gyp
+++ b/gpu/gles2_conform_support/gles2_conform_support.gyp
@@ -107,8 +107,7 @@
       ],
       'conditions': [
         # See http://crbug.com/162998#c4 for why this is needed.
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '../../base/allocator/allocator.gyp:allocator',
           ],
diff --git a/gpu/gpu.gyp b/gpu/gpu.gyp
index bfac7da83869e1..b0ccb9936eb7c3 100644
--- a/gpu/gpu.gyp
+++ b/gpu/gpu.gyp
@@ -287,8 +287,7 @@
           ],
         }],
         # See http://crbug.com/162998#c4 for why this is needed.
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
diff --git a/ipc/BUILD.gn b/ipc/BUILD.gn
index cccbb585caa9d1..9d9e49a4cbdc4c 100644
--- a/ipc/BUILD.gn
+++ b/ipc/BUILD.gn
@@ -114,8 +114,7 @@ if (!is_android) {
 
     # TODO(brettw) hook up tcmalloc to this target.
     #if (is_posix && !is_mac && !is_android) {
-    #  # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-    #  if ((use_allocator!="none" && use_allocator!="see_use_tcmalloc") || (use_allocator=="see_use_tcmalloc" && linux_use_tcmalloc)) {
+    #  if (use_allocator!="none") {
     #    deps += "/base/allocator"
     #  }
     #}
@@ -145,8 +144,7 @@ if (!is_android) {
 
     # TODO(brettw) hook up tcmalloc to this target.
     #if (is_posix && !is_mac && !is_android) {
-    #  # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-    #  if ((use_allocator!="none" && use_allocator!="see_use_tcmalloc") || (use_allocator=="see_use_tcmalloc" && linux_use_tcmalloc)) {
+    #  if (use_allocator!="none") {
     #    deps += "//base/allocator"
     #  }
     #}
diff --git a/ipc/ipc.gyp b/ipc/ipc.gyp
index dac7cfa488514e..c5a8c0bf39bbe2 100644
--- a/ipc/ipc.gyp
+++ b/ipc/ipc.gyp
@@ -74,8 +74,7 @@
         }],
         ['os_posix == 1 and OS != "mac" and OS != "android"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
@@ -113,8 +112,7 @@
         }],
         ['os_posix == 1 and OS != "mac" and OS != "android"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
diff --git a/media/media.gyp b/media/media.gyp
index 38dfcc5b589653..9da80d86c6bd39 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -1105,8 +1105,7 @@
         }],
         ['os_posix==1 and OS!="mac"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
@@ -1699,8 +1698,7 @@
           'conditions': [
             ['os_posix==1 and OS!="mac"', {
               'conditions': [
-                # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-                ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+                ['use_allocator!="none"', {
                   'dependencies': [
                     '../base/allocator/allocator.gyp:allocator',
                   ],
diff --git a/net/net.gyp b/net/net.gyp
index b7bd047f057207..50520b983cd3d9 100644
--- a/net/net.gyp
+++ b/net/net.gyp
@@ -551,8 +551,7 @@
         }],
         [ 'os_posix == 1 and OS != "mac" and OS != "android" and OS != "ios"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
@@ -911,8 +910,7 @@
         }],
         ['os_posix == 1 and OS != "mac" and OS != "android" and OS != "ios"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
diff --git a/ppapi/ppapi_tests.gypi b/ppapi/ppapi_tests.gypi
index da4b026b217b25..6fe9d90c32c5b5 100644
--- a/ppapi/ppapi_tests.gypi
+++ b/ppapi/ppapi_tests.gypi
@@ -126,8 +126,7 @@
       ],
       'conditions': [
         # See http://crbug.com/162998#c4 for why this is needed.
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
@@ -191,8 +190,7 @@
       'conditions': [
         [ 'os_posix == 1 and OS != "mac" and OS != "android" and OS != "ios"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            [ '(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            [ 'use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
diff --git a/printing/printing.gyp b/printing/printing.gyp
index aea2c2e1c7a3fe..792f5df9e561f3 100644
--- a/printing/printing.gyp
+++ b/printing/printing.gyp
@@ -247,8 +247,7 @@
         }],
         [ 'os_posix == 1 and OS != "mac" and OS != "android" and OS != "ios"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
diff --git a/remoting/remoting_host.gypi b/remoting/remoting_host.gypi
index 3782fff28dfbd8..ff1996f7a9ee17 100644
--- a/remoting/remoting_host.gypi
+++ b/remoting/remoting_host.gypi
@@ -752,8 +752,7 @@
                 }],  # mac_breakpad==1
               ],  # conditions
             }],  # OS=mac
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+            ['OS=="linux" and use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
@@ -784,8 +783,7 @@
             'host/setup/me2me_native_messaging_host_main.h',
           ],
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+            ['OS=="linux" and use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
@@ -877,8 +875,7 @@
                 '../build/linux/system.gyp:gtk',
               ],
             }],
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+            ['OS=="linux" and use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
diff --git a/remoting/remoting_host_linux.gypi b/remoting/remoting_host_linux.gypi
index 770e7641de7f41..5187bd23eee984 100644
--- a/remoting/remoting_host_linux.gypi
+++ b/remoting/remoting_host_linux.gypi
@@ -128,8 +128,7 @@
             'host/setup/start_host.cc',
           ],
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
diff --git a/remoting/remoting_test.gypi b/remoting/remoting_test.gypi
index 65160c3a0a9150..5d8e62a6b69e69 100644
--- a/remoting/remoting_test.gypi
+++ b/remoting/remoting_test.gypi
@@ -230,8 +230,7 @@
             ['exclude', '^base/resources_unittest\\.cc$'],
           ]
         }],
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        [ 'OS == "linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        [ 'OS == "linux" and use_allocator!="none"', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
diff --git a/sql/sql.gyp b/sql/sql.gyp
index f62a2eb8f8390a..6245940df266dd 100644
--- a/sql/sql.gyp
+++ b/sql/sql.gyp
@@ -99,8 +99,7 @@
       'conditions': [
         ['os_posix==1 and OS!="mac" and OS!="ios"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '../base/allocator/allocator.gyp:allocator',
               ],
diff --git a/sync/sync_tests.gypi b/sync/sync_tests.gypi
index b7cee38e545fef..2b69d68af534f8 100644
--- a/sync/sync_tests.gypi
+++ b/sync/sync_tests.gypi
@@ -505,8 +505,7 @@
         # TODO(akalin): This is needed because histogram.cc uses
         # leak_annotations.h, which pulls this in.  Make 'base'
         # propagate this dependency.
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
diff --git a/ui/app_list/app_list.gyp b/ui/app_list/app_list.gyp
index 666574219036aa..3dda480d6ad44a 100644
--- a/ui/app_list/app_list.gyp
+++ b/ui/app_list/app_list.gyp
@@ -258,8 +258,7 @@
           ],
         }],
         # See http://crbug.com/162998#c4 for why this is needed.
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '../../base/allocator/allocator.gyp:allocator',
             # The following two dependencies provide the missing
diff --git a/ui/aura/aura.gyp b/ui/aura/aura.gyp
index a8900f80d80fc3..9e5200e3e6584b 100644
--- a/ui/aura/aura.gyp
+++ b/ui/aura/aura.gyp
@@ -285,8 +285,7 @@
             '<(DEPTH)/third_party/mesa/mesa.gyp:osmesa',
           ],
         }],
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
            # See http://crbug.com/162998#c4 for why this is needed.
             '../../base/allocator/allocator.gyp:allocator',
diff --git a/ui/compositor/compositor.gyp b/ui/compositor/compositor.gyp
index 1145e8e5402289..28223978f12f0a 100644
--- a/ui/compositor/compositor.gyp
+++ b/ui/compositor/compositor.gyp
@@ -162,8 +162,7 @@
         }],
         ['os_posix == 1 and OS != "mac"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
               'dependencies': [
                 '<(DEPTH)/base/allocator/allocator.gyp:allocator',
               ],
diff --git a/ui/events/events.gyp b/ui/events/events.gyp
index fed04fb1b81e3d..faf21eeb65c65a 100644
--- a/ui/events/events.gyp
+++ b/ui/events/events.gyp
@@ -363,8 +363,7 @@
         'x/events_x_unittest.cc',
       ],
       'conditions': [
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '<(DEPTH)/base/allocator/allocator.gyp:allocator',
           ],
diff --git a/ui/keyboard/keyboard.gyp b/ui/keyboard/keyboard.gyp
index c4ca71451ef1d2..e780048b3ecb4f 100644
--- a/ui/keyboard/keyboard.gyp
+++ b/ui/keyboard/keyboard.gyp
@@ -99,8 +99,7 @@
         'keyboard_controller_unittest.cc',
       ],
       'conditions': [
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '<(DEPTH)/base/allocator/allocator.gyp:allocator',
           ],
diff --git a/ui/message_center/message_center.gyp b/ui/message_center/message_center.gyp
index 8812eb996da5bd..0ae2876d5ac79d 100644
--- a/ui/message_center/message_center.gyp
+++ b/ui/message_center/message_center.gyp
@@ -235,8 +235,7 @@
           ],
         }],
         # See http://crbug.com/162998#c4 for why this is needed.
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '../../base/allocator/allocator.gyp:allocator',
           ],
diff --git a/ui/snapshot/snapshot.gyp b/ui/snapshot/snapshot.gyp
index e34b0c23602159..a6a997e0b5d9f8 100644
--- a/ui/snapshot/snapshot.gyp
+++ b/ui/snapshot/snapshot.gyp
@@ -72,8 +72,7 @@
           ],
         }],
         # See http://crbug.com/162998#c4 for why this is needed.
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
           'dependencies': [
             '../../base/allocator/allocator.gyp:allocator',
           ],
diff --git a/ui/ui_unittests.gyp b/ui/ui_unittests.gyp
index 4e913381124c07..87f227e7b605cc 100644
--- a/ui/ui_unittests.gyp
+++ b/ui/ui_unittests.gyp
@@ -154,8 +154,7 @@
             'gfx/platform_font_pango_unittest.cc',
           ],
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            ['(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            ['use_allocator!="none"', {
                'dependencies': [
                  '../base/allocator/allocator.gyp:allocator',
                ],
diff --git a/ui/views/views.gyp b/ui/views/views.gyp
index 59f8c5aac61106..883c035a49c1fd 100644
--- a/ui/views/views.gyp
+++ b/ui/views/views.gyp
@@ -700,8 +700,7 @@
             '../../base/allocator/allocator.gyp:allocator',
           ],
         }],
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['OS=="linux" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))', {
+        ['OS=="linux" and use_allocator!="none"', {
            # See http://crbug.com/162998#c4 for why this is needed.
           'dependencies': [
             '../../base/allocator/allocator.gyp:allocator',
diff --git a/url/BUILD.gn b/url/BUILD.gn
index df7da69604b57c..3736b9c3b81a6f 100644
--- a/url/BUILD.gn
+++ b/url/BUILD.gn
@@ -101,8 +101,7 @@ if (!is_android) {
     ]
 
     #if (is_posix && !is_mac && !is_ios) {
-    #  # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-    #  if ((use_allocator!="none" && use_allocator!="see_use_tcmalloc") || (use_allocator=="see_use_tcmalloc" && linux_use_tcmalloc) {
+    #  if (use_allocator!="none") {
     #    deps += "//base/allocator"
     #  }
     #}
diff --git a/url/url.gyp b/url/url.gyp
index d1c3bf1e3d6018..0ffc51a8c410ec 100644
--- a/url/url.gyp
+++ b/url/url.gyp
@@ -77,8 +77,7 @@
         'url_util_unittest.cc',
       ],
       'conditions': [
-        # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-        ['os_posix==1 and OS!="mac" and OS!="ios" and ((use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1))',
+        ['os_posix==1 and OS!="mac" and OS!="ios" and use_allocator!="none"',
           {
             'dependencies': [
               '../base/allocator/allocator.gyp:allocator',
diff --git a/webkit/renderer/compositor_bindings/compositor_bindings_tests.gyp b/webkit/renderer/compositor_bindings/compositor_bindings_tests.gyp
index 53978a2116a5ea..f29a985b1431ab 100644
--- a/webkit/renderer/compositor_bindings/compositor_bindings_tests.gyp
+++ b/webkit/renderer/compositor_bindings/compositor_bindings_tests.gyp
@@ -39,8 +39,7 @@
         }],
         [ 'os_posix == 1 and OS != "mac" and OS != "android" and OS != "ios"', {
           'conditions': [
-            # TODO(dmikurube): Kill linux_use_tcmalloc. http://crbug.com/345554
-            [ '(use_allocator!="none" and use_allocator!="see_use_tcmalloc") or (use_allocator=="see_use_tcmalloc" and linux_use_tcmalloc==1)', {
+            [ 'use_allocator!="none"', {
               'dependencies': [
                 '<(DEPTH)/base/allocator/allocator.gyp:allocator',
               ],