Add stable id to PaintImage.

media/renderers/skcanvas_video_renderer.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 MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_
 #define MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_checker.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "cc/paint/paint_canvas.h"
 #include "cc/paint/paint_flags.h"
+#include "cc/paint/paint_image.h"
 #include "media/base/media_export.h"
 #include "media/base/timestamp_constants.h"
 #include "media/base/video_frame.h"
 #include "media/base/video_rotation.h"
 #include "media/filters/context_3d.h"
 #include "third_party/skia/include/core/SkImage.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 
 
 namespace gfx {
@@ skipping 139 matching lines @@
   // if the image couldn't be updated.
   bool UpdateLastImage(const scoped_refptr<VideoFrame>& video_frame,
                        const Context3D& context_3d);
 
   // Last image used to draw to the canvas.
   sk_sp<SkImage> last_image_;
   // Timestamp of the videoframe used to generate |last_image_|.
   base::TimeDelta last_timestamp_ = media::kNoTimestamp;
   // If |last_image_| is not used for a while, it's deleted to save memory.
   base::DelayTimer last_image_deleting_timer_;
+  // Stable paint image id to provide to draw image calls.
+  cc::PaintImage::Id renderer_stable_id_;
 
   // Used for DCHECKs to ensure method calls executed in the correct thread.
   base::ThreadChecker thread_checker_;
 
   // Used for unit test.
   SkISize last_image_dimensions_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(SkCanvasVideoRenderer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_RENDERERS_SKCANVAS_VIDEO_RENDERER_H_