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

chrome/browser/search_engines/search_provider_install_data_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 <string>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/search_engines/search_provider_install_data.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/search_engines/template_url_prepopulate_data.h"
 #include "chrome/browser/search_engines/template_url_service.h"
 #include "chrome/browser/search_engines/template_url_service_test_util.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
-#include "chrome/test/base/testing_pref_service.h"
+#include "chrome/test/base/testing_pref_service_syncable.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using content::BrowserThread;
 
 namespace {
 
@@ skipping 296 matching lines @@
   // Change the Google base url.
   google_host = "foo.com";
   util_.SetGoogleBaseURL(GURL("http://" + google_host + "/"));
   // Wait for the I/O thread to process the update notification.
   TemplateURLServiceTestUtil::BlockTillIOThreadProcessesRequests();
 
   // Verify that the change got picked up.
   test_get_install_state->set_search_provider_host(google_host);
   EXPECT_TRUE(test_get_install_state->RunTests());
 }