Split PrefService into PrefService, PrefServiceSimple and PrefServiceSyncable.

chrome/browser/task_manager/task_manager.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/task_manager/task_manager.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/i18n/number_formatting.h"
 #include "base/i18n/rtl.h"
@@ skipping 1203 matching lines @@
 
 bool TaskManager::Resource::CanInspect() const { return false; }
 
 content::WebContents* TaskManager::Resource::GetWebContents() const {
   return NULL;
 }
 
 bool TaskManager::Resource::IsBackground() const { return false; }
 
 // static
-void TaskManager::RegisterPrefs(PrefService* prefs) {
+void TaskManager::RegisterPrefs(PrefServiceSimple* prefs) {
   prefs->RegisterDictionaryPref(prefs::kTaskManagerWindowPlacement);
 }
 
 TaskManager::TaskManager()
     : ALLOW_THIS_IN_INITIALIZER_LIST(model_(new TaskManagerModel(this))) {
 }
 
 TaskManager::~TaskManager() {
 }
 
@@ skipping 108 matching lines @@
     // Count the number of extensions with background pages (including
     // incognito).
     count += CountExtensionBackgroundPagesForProfile(profile);
     if (profile->HasOffTheRecordProfile()) {
       count += CountExtensionBackgroundPagesForProfile(
           profile->GetOffTheRecordProfile());
     }
   }
   return count;
 }