Update flatbuffers to HEAD of upstream

BUG=611782

Review-Url: https://codereview.chromium.org/1992133002
Cr-Commit-Position: refs/heads/master@{#395543}

DEPS

@@ -216,7 +216,7 @@ deps = {
    Var('chromium_git') + '/chromium/deps/flac.git' + '@' + '812243a85937e06102ba312c6caf8823e243b35b',
 
   'src/third_party/flatbuffers/src':
-   Var('chromium_git') + '/external/github.com/google/flatbuffers.git' + '@' + '6f751d5d26fd566f8c9060358101a2596677f9cf',
+   Var('chromium_git') + '/external/github.com/google/flatbuffers.git' + '@' + '0ef72db7bfd3d483726dcaeedfbd9942d3523ffa',
 
   'src/third_party/pyftpdlib/src':
     Var('chromium_git') + '/external/pyftpdlib.git' + '@' + '2be6d65e31c7ee6320d059f581f05ae8d89d7e45',

third_party/flatbuffers/BUILD.gn

@@ -22,8 +22,9 @@ source_set("flatbuffers") {
 
 source_set("compiler_files") {
   sources = [
-    "src/include/idl.h",
-    "src/include/util.h",
+    "src/include/flatbuffers/code_generators.h",
+    "src/include/flatbuffers/idl.h",
+    "src/include/flatbuffers/util.h",
     "src/src/idl_gen_cpp.cpp",
     "src/src/idl_gen_fbs.cpp",
     "src/src/idl_gen_general.cpp",

third_party/flatbuffers/README.chromium

@@ -1,8 +1,8 @@
 Name: FlatBuffers
 Short Name: flatbuffers
 URL: https://github.com/google/flatbuffers
-Version: 6f751d5d26fd566f8c9060358101a2596677f9cf
-Date: 2016-02-20
+Version: 28543408
+Date: 2016-05-24
 License: Apache 2.0
 License File: LICENSE
 Security Critical: yes

third_party/flatbuffers/flatbuffers.gyp

@@ -22,8 +22,9 @@
         'src/src/idl_parser.cpp',
         'src/src/reflection.cpp',
         'src/src/util.cpp',
-        'src/include/idl.h',
-        'src/include/util.h',
+        'src/include/flatbuffers/code_generators.h',
+        'src/include/flatbuffers/idl.h',
+        'src/include/flatbuffers/util.h',
       ],
     },
     {