Fix black video frames when seeking (which also fixes flashing poster issue).

webkit/glue/media/video_renderer_impl.h

Index: webkit/glue/media/video_renderer_impl.h
diff --git a/webkit/glue/media/video_renderer_impl.h b/webkit/glue/media/video_renderer_impl.h
index 34c67d3e01b67a8a6d6b7476f26cf5e7de108adc..b8ff73dfb9f23ab793f85c20b03d6bd355be5ee4 100644
--- a/webkit/glue/media/video_renderer_impl.h
+++ b/webkit/glue/media/video_renderer_impl.h
@@ -31,6 +31,10 @@ class VideoRendererImpl : public WebVideoRenderer {
   virtual void SetWebMediaPlayerImplProxy(WebMediaPlayerImpl::Proxy* proxy);
   virtual void SetRect(const gfx::Rect& rect);
   virtual void Paint(skia::PlatformCanvas* canvas, const gfx::Rect& dest_rect);
+  virtual bool GetCurrentBitmap(SkBitmap* bitmap);
+  virtual void CopyBitmapToCanvas(const SkBitmap& bitmap,
+                                  skia::PlatformCanvas* canvas,
+                                  const gfx::Rect& dest_rect);
   virtual void GetCurrentFrame(scoped_refptr<media::VideoFrame>* frame_out);
   virtual void PutCurrentFrame(scoped_refptr<media::VideoFrame> frame);
 
@@ -49,10 +53,8 @@ class VideoRendererImpl : public WebVideoRenderer {
   // fast paint otherwise false.
   bool CanFastPaint(skia::PlatformCanvas* canvas, const gfx::Rect& dest_rect);
 
-  // Slow paint does a YUV => RGB, and scaled blit in two separate operations.
-  void SlowPaint(media::VideoFrame* video_frame,
-                 skia::PlatformCanvas* canvas,
-                 const gfx::Rect& dest_rect);
+  // Slow paint does a YUV => RGB conversion.
+  void SlowPaintToBitmap(media::VideoFrame* video_frame, SkBitmap* bitmap);
 
   // Fast paint does YUV => RGB, scaling, blitting all in one step into the
   // canvas. It's not always safe and appropriate to perform fast paint.