Tab/Desktop Capture: Use requests instead of timer-based refreshing.

content/browser/media/capture/desktop_capture_device_aura.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 CONTENT_BROWSER_MEDIA_CAPTURE_DESKTOP_CAPTURE_DEVICE_AURA_H_
 #define CONTENT_BROWSER_MEDIA_CAPTURE_DESKTOP_CAPTURE_DEVICE_AURA_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 16 matching lines @@
   // Creates a VideoCaptureDevice for the Aura desktop.  If |source| does not
   // reference a registered aura window, returns nullptr instead.
   static scoped_ptr<media::VideoCaptureDevice> Create(
       const DesktopMediaID& source);
 
   ~DesktopCaptureDeviceAura() override;
 
   // VideoCaptureDevice implementation.
   void AllocateAndStart(const media::VideoCaptureParams& params,
                         scoped_ptr<Client> client) override;
+  void RequestRefreshFrame() override;
   void StopAndDeAllocate() override;
 
  private:
   explicit DesktopCaptureDeviceAura(const DesktopMediaID& source);
 
   scoped_ptr<media::ScreenCaptureDeviceCore> core_;
 
   DISALLOW_COPY_AND_ASSIGN(DesktopCaptureDeviceAura);
 };
 
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MEDIA_CAPTURE_DESKTOP_CAPTURE_DEVICE_AURA_H_