media: Refactor SkCanvasVideoRenderer to use SkImages and not SkBitmaps.

media/blink/skcanvas_video_renderer.h

Index: media/blink/skcanvas_video_renderer.h
diff --git a/media/blink/skcanvas_video_renderer.h b/media/blink/skcanvas_video_renderer.h
index 9b75cd01e0fad04c242dd1463c73c6142e853845..94a6fa71697ed0e73e9135643e8863e94fc492e3 100644
--- a/media/blink/skcanvas_video_renderer.h
+++ b/media/blink/skcanvas_video_renderer.h
@@ -11,7 +11,6 @@
 #include "media/base/media_export.h"
 #include "media/base/video_rotation.h"
 #include "media/filters/context_3d.h"
-#include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/gfx/geometry/rect.h"
 
@@ -20,7 +19,6 @@ class SkCanvas;
 namespace media {
 
 class VideoFrame;
-class VideoImageGenerator;
 
 // Handles rendering of VideoFrames to SkCanvases, doing any necessary YUV
 // conversion and caching of resulting RGB bitmaps.
@@ -70,25 +68,6 @@ class MEDIA_EXPORT SkCanvasVideoRenderer {
                                                bool flip_y);
 
  private:
-  void ResetLastFrame();
-  void ResetAcceleratedLastFrame();
-
-  // An RGB bitmap and corresponding timestamp of the previously converted
-  // video frame data by software color space conversion.
-  SkBitmap last_frame_;
-  base::TimeDelta last_frame_timestamp_;
-  // If |last_frame_| is not used for a while, it's deleted to save memory.
-  base::DelayTimer<SkCanvasVideoRenderer> frame_deleting_timer_;
-
-  // This is a hardware accelerated copy of the frame generated by
-  // |accelerated_generator_|.
-  // It's used when |canvas| parameter in Paint() is Ganesh canvas.
-  // Note: all GrContext in SkCanvas instances are same.
-  SkBitmap accelerated_last_frame_;
-  VideoImageGenerator* accelerated_generator_;
-  base::TimeDelta accelerated_last_frame_timestamp_;
-  base::DelayTimer<SkCanvasVideoRenderer> accelerated_frame_deleting_timer_;
-
   DISALLOW_COPY_AND_ASSIGN(SkCanvasVideoRenderer);
 };