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

webkit/glue/media/web_video_renderer.h

Index: webkit/glue/media/web_video_renderer.h
diff --git a/webkit/glue/media/web_video_renderer.h b/webkit/glue/media/web_video_renderer.h
index efd31095ed2f944a1525bc404f6bcb25f1c5f4e3..161f85d5a9b4aa7b41c048ca6743cf5119ad45ba 100644
--- a/webkit/glue/media/web_video_renderer.h
+++ b/webkit/glue/media/web_video_renderer.h
@@ -28,6 +28,17 @@ class WebVideoRenderer : public media::VideoRendererBase {
   // Method called on the render thread.
   virtual void SetRect(const gfx::Rect& rect) = 0;
 
+  // Paint the current front frame on the |bitmap|.
+  // Returns true if there was anything to render.
+  //
+  // Method called on the render thread.
+  virtual bool GetCurrentBitmap(SkBitmap* bitmap) = 0;
+
+  // Scales the given bitmap to the given canvas.
+  virtual void CopyBitmapToCanvas(const SkBitmap& bitmap,
+                                  skia::PlatformCanvas* canvas,
+                                  const gfx::Rect& dest_rect) = 0;
+
   // Paint the current front frame on the |canvas| stretching it to fit the
   // |dest_rect|.
   //