Add support for messages.json format used to localize Chrome extensions.

grit/tool/build.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 '''The 'grit build' tool along with integration for this tool with the
 SCons build system.
 '''
 
 import filecmp
@@ skipping 204 matching lines @@
     for output in self.res.GetOutputFiles():
       self.VerboseOut('Creating %s...' % output.GetFilename())
 
       # Microsoft's RC compiler can only deal with single-byte or double-byte
       # files (no UTF-8), so we make all RC files UTF-16 to support all
       # character sets.
       if output.GetType() in ('rc_header', 'resource_map_header',
           'resource_map_source', 'resource_file_map_source'):
         encoding = 'cp1252'
       elif output.GetType() in ('android', 'c_format', 'js_map_format', 'plist',
-                                'plist_strings', 'doc', 'json'):
+                                'plist_strings', 'doc', 'json',
+                                'chrome_messages_json'):
         encoding = 'utf_8'
       else:
         # TODO(gfeher) modify here to set utf-8 encoding for admx/adml
         encoding = 'utf_16'
 
       # Set the context, for conditional inclusion of resources
       self.res.SetOutputLanguage(output.GetLanguage())
       self.res.SetOutputContext(output.GetContext())
       self.res.SetDefines(self.defines)
 
@@ skipping 48 matching lines @@
     # Print out any fallback warnings, and missing translation errors, and
     # exit with an error code if there are missing translations in a non-pseudo
     # and non-official build.
     warnings = (self.res.UberClique().MissingTranslationsReport().
         encode('ascii', 'replace'))
     if warnings and self.defines.get('_google_chrome', False):
       print warnings
     if self.res.UberClique().HasMissingTranslations():
       print self.res.UberClique().missing_translations_
       sys.exit(-1)