Componentize PrefSyncableService and support classes.

chrome/browser/chromeos/file_system_provider/registry_unittest.cc

 // Copyright 2014 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/chromeos/file_system_provider/registry.h"
 
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/file_system_provider/provided_file_system_info.h"
 #include "chrome/common/extensions/api/file_system_provider_capabilities/file_system_provider_capabilities_handler.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_browser_process.h"
-#include "chrome/test/base/testing_pref_service_syncable.h"
 #include "chrome/test/base/testing_profile.h"
 #include "chrome/test/base/testing_profile_manager.h"
+#include "components/syncable_prefs/testing_pref_service_syncable.h"
 #include "components/user_prefs/user_prefs.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace chromeos {
 namespace file_system_provider {
 namespace {
 
 const char kTemporaryOrigin[] =
     "chrome-extension://abcabcabcabcabcabcabcabcabcabcabcabca/";
@@ skipping 285 matching lines @@
       fake_watcher_.entry_path.value(), &watcher));
 
   std::string last_tag;
   EXPECT_TRUE(watcher->GetStringWithoutPathExpansion(kPrefKeyWatcherLastTag,
                                                      &last_tag));
   EXPECT_EQ(fake_watcher_.last_tag, last_tag);
 }
 
 }  // namespace file_system_provider
 }  // namespace chromeos