Clean up the posix source files in ui/

This is a preliminary change to remove the posix source exclusion
filter in a future commit.

Bug: 835405
Change-Id: I69e6b3ba30daafc57ab06c664f0166ba537dbc05
Reviewed-on: https://chromium-review.googlesource.com/1022315
Commit-Queue: Fabrice de Gans-Riberi <fdegans@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#552523}

ui/base/BUILD.gn

@@ -210,7 +210,6 @@ component("base") {
     "l10n/l10n_util_collator.h",
     "l10n/l10n_util_mac.h",
     "l10n/l10n_util_mac.mm",
-    "l10n/l10n_util_posix.cc",
     "l10n/l10n_util_win.cc",
     "l10n/l10n_util_win.h",
     "l10n/time_format.cc",
@@ -325,6 +324,10 @@ component("base") {
     "work_area_watcher_observer.h",
   ]
 
+  if (is_posix) {
+    sources += [ "l10n/l10n_util_posix.cc" ]
+  }
+
   if (!is_ios) {
     sources += [
       "accelerators/accelerator.cc",
@@ -394,6 +397,7 @@ component("base") {
   if (is_fuchsia) {
     sources += [
       "idle/idle_fuchsia.cc",
+      "l10n/l10n_util_posix.cc",
       "resource/resource_bundle_fuchsia.cc",
     ]
   }

ui/events/BUILD.gn

@@ -159,7 +159,6 @@ component("events") {
     "win/keyboard_hook_win.cc",
     "win/system_event_state_lookup.cc",
     "win/system_event_state_lookup.h",
-    "x/keyboard_hook_posix.cc",
   ]
 
   defines = [ "EVENTS_IMPLEMENTATION" ]
@@ -179,7 +178,10 @@ component("events") {
   ]
 
   if (use_x11) {
-    sources += [ "x/events_x.cc" ]
+    sources += [
+      "x/events_x.cc",
+      "x/keyboard_hook_posix.cc",
+    ]
     configs += [ "//build/config/linux:x11" ]
     deps += [
       "//ui/events/devices",

ui/surface/BUILD.gn

@@ -10,7 +10,6 @@ jumbo_component("surface") {
     "surface_export.h",
     "transport_dib.cc",
     "transport_dib.h",
-    "transport_dib_posix.cc",
     "transport_dib_win.cc",
   ]
 
@@ -26,4 +25,8 @@ jumbo_component("surface") {
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
+
+  if (is_posix) {
+    sources += [ "transport_dib_posix.cc" ]
+  }
 }