Do YUV conversion on the GPU when copying video frames into a GPU-accelerated canvas.

media/filters/skcanvas_video_renderer.h

Index: media/filters/skcanvas_video_renderer.h
diff --git a/media/filters/skcanvas_video_renderer.h b/media/filters/skcanvas_video_renderer.h
index 3d1f4da56f76ef31b546b581bd1c85ca5ecdb2ee..131859c8756f47d38adeba402fbd2cbbe7470b71 100644
--- a/media/filters/skcanvas_video_renderer.h
+++ b/media/filters/skcanvas_video_renderer.h
@@ -13,6 +13,7 @@
 #include "ui/gfx/rect.h"
 
 class SkCanvas;
+class GrContext;
 
 namespace media {
 
@@ -40,11 +41,27 @@ class MEDIA_EXPORT SkCanvasVideoRenderer {
   void Copy(media::VideoFrame* video_frame, SkCanvas* canvas);
 
  private:
+  // Special paint routine that uses a hardware-accelerated canvas to do YUV
+  // conversion.
+  bool HardwarePaint(media::VideoFrame* video_frame,
+                     GrContext* gr,
+                     const SkRect& dest_rect,
+                     SkXfermode::Mode mode,
+                     VideoRotation video_rotation);
+
   // An RGB bitmap and corresponding timestamp of the previously converted
   // video frame data.
   SkBitmap last_frame_;
   base::TimeDelta last_frame_timestamp_;
 
+  // These never actually allocate pixels, but wrap our yuv planes so that we
+  // can use them for hardware yuv conversion.
+  SkBitmap yuv_planes_[3];
+
+  // We store a separate timestamp for |yuv_planes_|'s contents, as they can get
+  // cached separately on the GPU.
+  base::TimeDelta yuv_planes_timestamp_;
+
   DISALLOW_COPY_AND_ASSIGN(SkCanvasVideoRenderer);
 };