Split testing_pref_service.h/.cc into two parts, generic vs. Chrome-specific.

chrome/browser/web_resource/promo_resource_service_mobile_ntp_unittest.cc

 // 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.
 
 #include <vector>
 
 #include "base/json/json_reader.h"
 #include "base/message_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/web_resource/notification_promo.h"
 #include "chrome/browser/web_resource/promo_resource_service.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
+#include "chrome/test/base/scoped_testing_local_state.h"
 #include "chrome/test/base/testing_browser_process.h"
-#include "chrome/test/base/testing_pref_service.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #include "chrome/browser/web_resource/notification_promo_mobile_ntp.h"
 
 class PromoResourceServiceMobileNtpTest : public testing::Test {
  public:
   // |promo_resource_service_| must be created after |local_state_|.
   PromoResourceServiceMobileNtpTest()
@@ skipping 143 matching lines @@
       "It\'s simple. Go http://www.google.com/chrome/",
       "ACTION_EMAIL", "This is the body.", "XXX value");
 
   promo_test.InitPromoFromJson(true);
 
   // Second time should not trigger a notification.
   promo_test.InitPromoFromJson(false);
 
   promo_test.TestInitFromPrefs();
 }