Create a PrefStore in support of Blimp metrics collection.

android_webview/android_webview.gyp

 # Copyright 2009 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,
     'system_webview_package_name%': 'com.android.webview',
   },
   'targets': [
     {
@@ skipping 295 matching lines @@
         'browser/aw_login_delegate.h',
         'browser/aw_media_client_android.cc',
         'browser/aw_media_client_android.h',
         'browser/aw_message_port_message_filter.cc',
         'browser/aw_message_port_message_filter.h',
         'browser/aw_message_port_service.h',
         'browser/aw_metrics_service_client.cc',
         'browser/aw_metrics_service_client.h',
         'browser/aw_permission_manager.cc',
         'browser/aw_permission_manager.h',
-        'browser/aw_pref_store.cc',
-        'browser/aw_pref_store.h',
         'browser/aw_print_manager.cc',
         'browser/aw_print_manager.h',
         'browser/aw_printing_message_filter.cc',
         'browser/aw_printing_message_filter.h',
         'browser/aw_quota_manager_bridge.cc',
         'browser/aw_quota_manager_bridge.h',
         'browser/aw_quota_permission_context.cc',
         'browser/aw_quota_permission_context.h',
         'browser/aw_render_thread_context_provider.cc',
         'browser/aw_render_thread_context_provider.h',
@@ skipping 182 matching lines @@
           'includes': [ 'apk/system_webview_apk_common.gypi' ],
         },
       ],
     }]
   ],
   'includes': [
     'android_webview_tests.gypi',
     'apk/system_webview_paks.gypi',
   ],
 }