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"
-
-namespace gfx {
-class Rect;
-}  // namespace gfx
-
-namespace media {
-class VideoFrame;
-}  // namespace media
-
-namespace content {
-
-// Defines an interface for listening to events of frame presentation and to
-// instruct the platform layer (i.e. RenderWidgetHostView) to copy a frame.
-//
-// Further processing is possible (e.g. scale and color space conversion)
-// through this interface. See ShouldCaptureFrame() for details.
-//
-// It is platform dependent which thread this object lives on, but it is
-// guaranteed to be used on a single thread.
-class RenderWidgetHostViewFrameSubscriber {
- public:
-  virtual ~RenderWidgetHostViewFrameSubscriber() {}
-
-  // Called when a captured frame is available or the frame is no longer
-  // needed by the platform layer.
-  //
-  // If |frame_captured| is true then frame provided contains valid content and
-  // |timestamp| is the time when the frame was painted.
-  //
-  // If |frame_captured| is false then the content in frame provided is
-  // invalid. There was an error during the process of frame capture or the
-  // platform layer is shutting down. |timestamp| is also invalid in this case.
-  //
-  // |region_in_frame| is the location within the Videoframe where the
-  // captured content resides, with the rest of the VideoFrame blacked out.
-  typedef base::Callback<void(base::TimeTicks /* timestamp */,
-                              const gfx::Rect& /* region_in_frame */,
-                              bool /* frame_captured */)> DeliverFrameCallback;
-
-  // Called when a new frame is going to be presented at time
-  // |present_time| with |damage_rect| being the region of the frame that has
-  // changed since the last frame. The implementation decides whether the
-  // current frame should be captured or not.
-  //
-  // Return true if the current frame should be captured. If so, |storage|
-  // will be set to hold an appropriately sized and allocated buffer into which
-  // to copy the frame. The platform presenter will perform scaling and color
-  // space conversion to fit into the output frame.
-  //
-  // Destination format is determined by |storage|, currently only
-  // media::PIXEL_FORMAT_YV12 is supported. Platform layer will perform color
-  // 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;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_VIEW_FRAME_SUBSCRIBER_H_