Replace source pointer in cc::CopyOutputRequest with a base::UnguessableToken

content/public/browser/render_widget_host_view_frame_subscriber.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 CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_FRAME_SUBSCRIBER_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_FRAME_SUBSCRIBER_H_
 
 #include "base/callback.h"
 #include "base/time/time.h"
+#include "cc/output/copy_output_request.h"
 
 namespace gfx {
 class Rect;
 }  // namespace gfx
 
 namespace media {
 class VideoFrame;
 }  // namespace media
 
 namespace content {
@@ skipping 41 matching lines @@
   // space conversion if needed.
   //
   // When the frame is available |callback| will be called. It is up to the
   // platform layer to decide when to deliver a captured frame.
   //
   // Return false if the current frame should not be captured.
   virtual bool ShouldCaptureFrame(const gfx::Rect& damage_rect,
                                   base::TimeTicks present_time,
                                   scoped_refptr<media::VideoFrame>* storage,
                                   DeliverFrameCallback* callback) = 0;
+
+  virtual base::UnguessableToken GetSourceIdForCopyRequest() = 0;

[Fady Samuel, 2017/01/26 21:22:42]

const base::UnguessableToken&

[Saman Sami, 2017/01/26 21:47:27]

Done.

 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_FRAME_SUBSCRIBER_H_