Add extensions code to use common updater in components/update_client/

chrome/browser/extensions/chrome_extensions_browser_client.h

 // Copyright 2013 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_CHROME_EXTENSIONS_BROWSER_CLIENT_H_
 #define CHROME_BROWSER_EXTENSIONS_CHROME_EXTENSIONS_BROWSER_CLIENT_H_
 
-#include <map>
+#include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/lazy_instance.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/extensions/chrome_notification_observer.h"
 #include "extensions/browser/extensions_browser_client.h"
 
 namespace base {
 class CommandLine;
 }
 
 namespace content {
 class BrowserContext;
@@ skipping 81 matching lines @@
   bool IsMinBrowserVersionSupported(const std::string& min_version) override;
   ExtensionWebContentsObserver* GetExtensionWebContentsObserver(
       content::WebContents* web_contents) override;
   void ReportError(content::BrowserContext* context,
                    scoped_ptr<ExtensionError> error) override;
   void CleanUpWebView(content::BrowserContext* browser_context,
                       int embedder_process_id,
                       int view_instance_id) override;
   void AttachExtensionTaskManagerTag(content::WebContents* web_contents,
                                      ViewType view_type) override;
+  scoped_refptr<update_client::UpdateClient> CreateUpdateClient(
+      content::BrowserContext* context) override;
 
  private:
   friend struct base::DefaultLazyInstanceTraits<ChromeExtensionsBrowserClient>;
 
   // Observer for Chrome-specific notifications.
   ChromeNotificationObserver notification_observer_;
 
   // Support for ProcessManager.
   scoped_ptr<ChromeProcessManagerDelegate> process_manager_delegate_;
 
   // Client for API implementations.
   scoped_ptr<ChromeExtensionsAPIClient> api_client_;
 
   scoped_ptr<ChromeComponentExtensionResourceManager> resource_manager_;
 
   scoped_ptr<ExtensionCache> extension_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeExtensionsBrowserClient);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_CHROME_EXTENSIONS_BROWSER_CLIENT_H_