Fix a memory leak in RulesRegistryStorageDelegate.

chrome/browser/extensions/api/declarative/rules_registry_storage_delegate.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_RULES_REGISTRY_STORAGE_DELEGATE_H__
 #define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_RULES_REGISTRY_STORAGE_DELEGATE_H__
 #pragma once
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 
 #include "chrome/browser/extensions/api/declarative/rules_registry_with_cache.h"
 
 class Profile;
 
 namespace extensions {
 
 // A Delegate to the RulesRegistryWithCache which handles reading/writing rules
-// to the extension state store. This class should be initialized on the UI
+// to the extension state store. This class should be (de)initialized on the UI
 // thread, but used on the RulesRegistry thread.
 class RulesRegistryStorageDelegate : public RulesRegistryWithCache::Delegate {
  public:
   RulesRegistryStorageDelegate();
   virtual ~RulesRegistryStorageDelegate();
 
   // Called on the UI thread to initialize the delegate.
-  void Init(Profile* profile,
-            RulesRegistryWithCache* rules_registry,
-            const std::string& storage_key);
+  void InitOnUIThread(Profile* profile,
+                      RulesRegistryWithCache* rules_registry,
+                      const std::string& storage_key);
+  void CleanupOnUIThread();
 
   // RulesRegistryWithCache::Delegate
   virtual bool IsReady() OVERRIDE;
   virtual void OnRulesChanged(RulesRegistryWithCache* rules_registry,
                               const std::string& extension_id) OVERRIDE;
 
  private:
   class Inner;
 
   scoped_refptr<Inner> inner_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_RULES_REGISTRY_STORAGE_DELEGATE_H__