Fixed leaks of WebstoreStandaloneInstallers in some code paths

chrome/browser/extensions/webstore_standalone_installer.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_WEBSTORE_STANDALONE_INSTALLER_H_
 #define CHROME_BROWSER_EXTENSIONS_WEBSTORE_STANDALONE_INSTALLER_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 168 matching lines @@
   virtual void InstallUIAbort(bool user_initiated) OVERRIDE;
 
   // WebstoreInstaller::Delegate interface implementation.
   virtual void OnExtensionInstallSuccess(const std::string& id) OVERRIDE;
   virtual void OnExtensionInstallFailure(
       const std::string& id,
       const std::string& error,
       WebstoreInstaller::FailureReason reason) OVERRIDE;
 
   void ShowInstallUI();
+  void OnWebStoreDataFetcherDone();
 
   // Input configuration.
   std::string id_;
   Callback callback_;
   Profile* profile_;
   WebstoreInstaller::InstallSource install_source_;
 
   // Installation dialog and its underlying prompt.
   scoped_ptr<ExtensionInstallPrompt> install_ui_;
   scoped_ptr<ExtensionInstallPrompt::Prompt> install_prompt_;
@@ skipping 15 matching lines @@
   // Created by ShowInstallUI() when a prompt is shown (if
   // the implementor returns a non-NULL in CreateInstallPrompt()).
   scoped_refptr<Extension> localized_extension_for_display_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WebstoreStandaloneInstaller);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_WEBSTORE_STANDALONE_INSTALLER_H_