Add all locales to the appropriate generated file lists in .gyp files....

build/common.gypi

 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   'variables': {
     # .gyp files should set chromium_code to 1 if they build Chromium-specific
@@ skipping 171 matching lines @@
           }],
           # Don't do incremental linking for large modules on 32-bit.
           ['MSVS_OS_BITS==32', {
             'msvs_large_module_debug_link_mode%': '1',  # No
           },{
             'msvs_large_module_debug_link_mode%': '2',  # Yes
           }],
         ],
       }],
     ],
+
+    # NOTE: When these end up in the Mac bundle, we need to replace '-' for '_'
+    # so Cocoa is happy (http://crbug.com/20441).
+    'locales': [
+      'ar', 'bg', 'bn', 'ca', 'cs', 'da', 'de', 'el', 'en-GB',
+      'en-US', 'es-419', 'es', 'et', 'fi', 'fil', 'fr', 'gu', 'he',
+      'hi', 'hr', 'hu', 'id', 'it', 'ja', 'kn', 'ko', 'lt', 'lv',
+      'ml', 'mr', 'nb', 'nl', 'or', 'pl', 'pt-BR', 'pt-PT', 'ro',
+      'ru', 'sk', 'sl', 'sr', 'sv', 'ta', 'te', 'th', 'tr',
+      'uk', 'vi', 'zh-CN', 'zh-TW',
+    ],
   },
   'target_defaults': {
     'variables': {
       'mac_release_optimization%': '3', # Use -O3 unless overridden
       'mac_debug_optimization%': '0',   # Use -O0 unless overridden
       'release_extra_cflags%': '',
       'debug_extra_cflags%': '',
     },
     'conditions': [
       ['branding=="Chrome"', {
@@ skipping 616 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }