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

chrome/browser/content_settings/host_content_settings_map_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 "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/content_settings/content_settings_details.h"
 #include "chrome/browser/content_settings/cookie_settings.h"
 #include "chrome/browser/content_settings/host_content_settings_map.h"
 #include "chrome/browser/content_settings/mock_settings_observer.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.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/test/test_browser_thread.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/static_cookie_policy.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using content::BrowserThread;
 
 using ::testing::_;
 
@@ skipping 1042 matching lines @@
                 GURL("http://other.com"),
                 CONTENT_SETTINGS_TYPE_COOKIES,
                 std::string()));
   EXPECT_EQ(CONTENT_SETTING_SESSION_ONLY,
             host_content_settings_map->GetContentSetting(
                 GURL("http://third.com"),
                 GURL("http://third.com"),
                 CONTENT_SETTINGS_TYPE_COOKIES,
                 std::string()));
 }