Add an ExtensionPrefStore, layered between the user prefs nad the managed pre...

chrome/browser/extensions/test_extension_prefs.cc

 // Copyright (c) 2010 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/extensions/test_extension_prefs.h"
 
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
@@ skipping 24 matching lines @@
     // The PrefService writes its persistent file on the file thread, so we
     // need to wait for any pending I/O to complete before creating a new
     // PrefService.
     MessageLoop file_loop;
     ChromeThread file_thread(ChromeThread::FILE, &file_loop);
     pref_service_->SavePersistentPrefs();
     file_loop.RunAllPending();
   }
 
   // Create a |PrefService| instance that contains only user defined values.
-  pref_service_.reset(new PrefService(new PrefValueStore(
-    NULL, /* no managed preference values */
-    new JsonPrefStore( /* user defined preferemnce values*/
-        preferences_file_,
-        ChromeThread::GetMessageLoopProxyForThread(ChromeThread::FILE)),
-    NULL /* no suggested preference values*/)));
+  pref_service_.reset(PrefService::CreateUserPrefService(preferences_file_));
   ExtensionPrefs::RegisterUserPrefs(pref_service_.get());
   prefs_.reset(new ExtensionPrefs(pref_service_.get(), temp_dir_.path()));
 }
 
 Extension* TestExtensionPrefs::AddExtension(std::string name) {
   DictionaryValue dictionary;
   dictionary.SetString(extension_manifest_keys::kName, name);
   dictionary.SetString(extension_manifest_keys::kVersion, "0.1");
   return AddExtensionWithManifest(dictionary);
 }
@@ skipping 11 matching lines @@
   const bool kInitialIncognitoEnabled = false;
   prefs_->OnExtensionInstalled(extension, Extension::ENABLED,
                                kInitialIncognitoEnabled);
   return extension;
 }
 
 std::string TestExtensionPrefs::AddExtensionAndReturnId(std::string name) {
   scoped_ptr<Extension> extension(AddExtension(name));
   return extension->id();
 }