Drive extension functions from ExtensionFunction::Run. The

chrome/browser/extensions/api/desktop_capture/desktop_capture_api.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_API_DESKTOP_CAPTURE_DESKTOP_CAPTURE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_DESKTOP_CAPTURE_DESKTOP_CAPTURE_API_H_
 
 #include <map>
 
 #include "base/memory/singleton.h"
@@ skipping 31 matching lines @@
   static void SetPickerFactoryForTests(PickerFactory* factory);
 
   DesktopCaptureChooseDesktopMediaFunction();
 
   void Cancel();
 
  private:
   virtual ~DesktopCaptureChooseDesktopMediaFunction();
 
   // ExtensionFunction overrides.
-  virtual bool RunImpl() OVERRIDE;
+  virtual bool RunAsync() OVERRIDE;
 
   // content::WebContentsObserver overrides.
   virtual void WebContentsDestroyed(
       content::WebContents* web_contents) OVERRIDE;
 
   void OnPickerDialogResults(content::DesktopMediaID source);
 
   int request_id_;
 
   // Parameters of the tab the stream is requested for.
@@ skipping 49 matching lines @@
                    DesktopCaptureChooseDesktopMediaFunction*> RequestsMap;
 
   RequestsMap requests_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopCaptureRequestsRegistry);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_DESKTOP_CAPTURE_DESKTOP_CAPTURE_API_H_