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

chrome/browser/sync/invalidations/invalidator_storage_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 "chrome/browser/sync/invalidations/invalidator_storage.h"
 
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 #include "base/prefs/pref_service.h"
 #include "base/string_util.h"
 #include "base/strings/string_number_conversions.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 "sync/internal_api/public/base/invalidation_test_util.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using syncer::InvalidationStateMap;
 
 namespace browser_sync {
 
 namespace {
 
@@ skipping 468 matching lines @@
   EXPECT_TRUE(it->second.IsValid());
   state_map[kBookmarksId_].expected = it->second;
   EXPECT_EQ(state_map, storage.GetAllInvalidationStates());
 
   storage.Acknowledge(kBookmarksId_, it->second);
   state_map[kBookmarksId_].current = it->second;
   EXPECT_EQ(state_map, storage.GetAllInvalidationStates());
 }
 
 }  // namespace browser_sync