Prepare AutocompleteController for componentization

components/omnibox.gypi

 # Copyright 2014 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': [
     {
       # GN version: //components/omnibox
       'target_name': 'omnibox',
       'type': 'static_library',
@@ skipping 100 matching lines @@
         'proto_out_dir': 'components/omnibox',
       },
       'includes': [ '../build/protoc.gypi', ],
     },
     {
       # GN version: //components/omnibox:test_support
       'target_name': 'omnibox_test_support',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
+        '../testing/gmock.gyp:gmock',
         'omnibox',
         'component_metrics_proto',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         # Note: sources list duplicated in GN build.
+        'omnibox/mock_autocomplete_provider_client.cc',
+        'omnibox/mock_autocomplete_provider_client.h',
         'omnibox/test_scheme_classifier.cc',
         'omnibox/test_scheme_classifier.h',
       ],
     },
   ],
 }