Move 'theme' parsing out of Extension class

chrome/chrome_common.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'common',
       'type': 'static_library',
       'variables': {
@@ skipping 128 matching lines @@
         'common/extensions/api/extension_api.h',
         'common/extensions/api/extension_api_stub.cc',
         'common/extensions/api/input_ime/input_components_handler.cc',
         'common/extensions/api/input_ime/input_components_handler.h',
         'common/extensions/api/file_handlers/file_handlers_parser.cc',
         'common/extensions/api/file_handlers/file_handlers_parser.h',
         'common/extensions/api/omnibox/omnibox_handler.cc',
         'common/extensions/api/omnibox/omnibox_handler.h',
         'common/extensions/api/speech/tts_engine_manifest_handler.cc',
         'common/extensions/api/speech/tts_engine_manifest_handler.h',
+        'common/extensions/api/themes/theme_handler.cc',
+        'common/extensions/api/themes/theme_handler.h',
         'common/extensions/command.cc',
         'common/extensions/command.h',
         'common/extensions/csp_validator.cc',
         'common/extensions/csp_validator.h',
         'common/extensions/draggable_region.cc',
         'common/extensions/draggable_region.h',
         'common/extensions/event_filter.cc',
         'common/extensions/event_filter.h',
         'common/extensions/event_filtering_info.cc',
         'common/extensions/event_filtering_info.h',
@@ skipping 312 matching lines @@
             '../device/device.gyp:device_usb',
           ],
         }, {  # enable_extensions == 0
           'sources/': [
             ['exclude', '^common/extensions/api/'],
             ['include', 'common/extensions/api/extension_api_stub.cc'],
             ['include', 'common/extensions/api/extension_action/action_info.cc'],
             ['include', 'common/extensions/api/extension_action/action_info.h'],
             ['include', 'common/extensions/api/extension_action/browser_action_handler.cc'],
             ['include', 'common/extensions/api/extension_action/browser_action_handler.h'],
+            ['include', 'common/extensions/api/themes/theme_handler.cc'],
+            ['include', 'common/extensions/api/themes/theme_handler.h'],
           ],
         }],
         ['remoting==1', {
           'dependencies': [
             '../remoting/remoting.gyp:remoting_client_plugin',
           ],
         }],
         ['enable_automation==0', {
           'sources/': [
             ['exclude', '^common/automation_']
@@ skipping 182 matching lines @@
         'common/metrics/proto/user_action_event.proto',
       ],
       'variables': {
         'proto_in_dir': 'common/metrics/proto',
         'proto_out_dir': 'chrome/common/metrics/proto',
       },
       'includes': [ '../build/protoc.gypi' ],
     },
   ],
 }