Extensions: Split extensions utility IPC messages into its own file.

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 432 matching lines @@
       ],
       'conditions': [
         ['enable_extensions==0', {
           # Exclude all API implementations and the ExtensionsApiClient
           # interface. Moving an API from src/chrome to src/extensions implies
           # it can be cleanly disabled with enable_extensions==0.
           # TODO: Eventually the entire extensions module should not be built
           # when enable_extensions==0.
           'sources/': [
             ['exclude', '^browser/api/'],
-            ['include', '^browser/api/runtime/runtime_api.cc'],
-            ['include', '^browser/api/runtime/runtime_api_delegate.cc'],
           ],
           'sources!': [
             'browser/browser_context_keyed_service_factories.cc',
             'browser/browser_context_keyed_service_factories.h',
           ],
           'dependencies!': [
             '../components/components.gyp:usb_service',
           ],
         }],
       ],
@@ skipping 218 matching lines @@
         'test/test_extensions_client.cc',
         'test/test_extensions_client.h',
         'test/test_permission_message_provider.cc',
         'test/test_permission_message_provider.h',
         'test/test_permissions_provider.cc',
         'test/test_permissions_provider.h',
       ],
     },
   ]
 }