Move constants in guest view from chrome to extensions.

extensions/extensions.gyp

 # Copyright 2013 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 429 matching lines @@
         'browser/extension_system_provider.h',
         'browser/extension_util.cc',
         'browser/extension_util.h',
         'browser/extension_web_contents_observer.cc',
         'browser/extension_web_contents_observer.h',
         'browser/extensions_browser_client.cc',
         'browser/extensions_browser_client.h',
         'browser/external_provider_interface.h',
         'browser/granted_file_entry.cc',
         'browser/granted_file_entry.h',
+        'browser/guest_view/guest_view_constants.cc',
+        'browser/guest_view/guest_view_constants.h',
         'browser/image_loader.cc',
         'browser/image_loader.h',
         'browser/image_loader_factory.cc',
         'browser/image_loader_factory.h',
         'browser/image_util.cc',
         'browser/image_util.h',
         'browser/info_map.cc',
         'browser/info_map.h',
         'browser/install_flag.h',
         'browser/file_highlighter.cc',
@@ skipping 438 matching lines @@
       'type': 'static_library',
       'sources': [ 'browser/api/cast_channel/cast_channel.proto' ],
       'variables': {
           'proto_in_dir': 'browser/api/cast_channel',
           'proto_out_dir': 'extensions/browser/api/cast_channel',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ]
 }