Actually fix memory leak in ExtensionSettingsStorageQuotaEnforcer.

chrome/browser/extensions/extension_settings_storage_quota_enforcer.h

 // Copyright (c) 2011 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_EXTENSION_SETTINGS_STORAGE_QUOTA_ENFORCER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_STORAGE_QUOTA_ENFORCER_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 22 matching lines @@
   virtual Result Clear() OVERRIDE;
 
  private:
   // The storage quota in bytes.
   size_t const quota_bytes_;
 
   // The maximum number of settings keys allowed.
   size_t const max_keys_;
 
   // The delegate storage area.
-  ExtensionSettingsStorage* const delegate_;
+  scoped_ptr<ExtensionSettingsStorage> const delegate_;
 
   // Total size of the settings currently being used.  Includes both settings
   // keys and their JSON-encoded values.
   size_t used_total_;
 
   // Map of key to size of that key, including the key itself.
   std::map<std::string, size_t> used_per_setting_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionSettingsStorageQuotaEnforcer);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SETTINGS_STORAGE_QUOTA_ENFORCER_H_