2D Canvas doesn't blend video with the destination buffer.

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 0e5c5203396c347cc11385485d691c8712776fe5..3d1f4da56f76ef31b546b581bd1c85ca5ecdb2ee 100644
--- a/media/filters/skcanvas_video_renderer.h
+++ b/media/filters/skcanvas_video_renderer.h
@@ -9,6 +9,7 @@
 #include "media/base/media_export.h"
 #include "media/base/video_rotation.h"
 #include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkXfermode.h"
 #include "ui/gfx/rect.h"
 
 class SkCanvas;
@@ -32,8 +33,12 @@ class MEDIA_EXPORT SkCanvasVideoRenderer {
              SkCanvas* canvas,
              const gfx::RectF& dest_rect,
              uint8 alpha,
+             SkXfermode::Mode mode,
              VideoRotation video_rotation);
 
+  // Copy |video_frame| on |canvas|.
+  void Copy(media::VideoFrame* video_frame, SkCanvas* canvas);
+
  private:
   // An RGB bitmap and corresponding timestamp of the previously converted
   // video frame data.