[TTS] Add aggregation of CTR metrics to the CS component.

components/contextual_search.gypi

 # Copyright 2015 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: //components/contextual_search:browser
       'target_name': 'contextual_search_browser',
       'type': 'static_library',
       'include_dirs': [
         '..',
       ],
       'dependencies': [
         'contextual_search_mojo_bindings',
         '../base/base.gyp:base',
       ],
       'sources': [
         'contextual_search/browser/contextual_search_js_api_service_impl.cc',
         'contextual_search/browser/contextual_search_js_api_service_impl.h',
+        'contextual_search/browser/ctr_aggregator.cc',
+        'contextual_search/browser/ctr_aggregator.h',
+        'contextual_search/browser/native_int_storage.h',
       ],
     },
     {
       # GN: //components/contextual_search:renderer
       'target_name': 'contextual_search_renderer',
       'type': 'static_library',
       'include_dirs': [
         '..',
         '../third_party/WebKit',
       ],
@@ skipping 22 matching lines @@
       ],
       'variables': {
         'use_new_wrapper_types': 'false',
       },
       'includes': [
         '../mojo/mojom_bindings_generator.gypi',
       ],
     },
   ],
 }