media: Refactor SkCanvasVideoRenderer to use SkImages and not SkBitmaps.

media/blink/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_BLINK_SKCANVAS_VIDEO_RENDERER_H_
 #define MEDIA_BLINK_SKCANVAS_VIDEO_RENDERER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #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"
 
 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.
 class MEDIA_EXPORT SkCanvasVideoRenderer {
  public:
   SkCanvasVideoRenderer();
   ~SkCanvasVideoRenderer();
 
   // Paints |video_frame| on |canvas|, scaling and rotating the result to fit
   // dimensions specified by |dest_rect|.
@@ skipping 29 matching lines @@
   // The format of |video_frame| must be VideoFrame::NATIVE_TEXTURE.
   static void CopyVideoFrameTextureToGLTexture(gpu::gles2::GLES2Interface* gl,
                                                VideoFrame* video_frame,
                                                unsigned int texture,
                                                unsigned int internal_format,
                                                unsigned int type,
                                                bool premultiply_alpha,
                                                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);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_SKCANVAS_VIDEO_RENDERER_H_