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

webkit/glue/media/web_video_renderer.h

 // Copyright (c) 2010 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 WEBKIT_GLUE_MEDIA_WEB_VIDEO_RENDERER_H_
 #define WEBKIT_GLUE_MEDIA_WEB_VIDEO_RENDERER_H_
 
 #include "media/base/video_frame.h"
 #include "media/filters/video_renderer_base.h"
 #include "webkit/glue/webmediaplayer_impl.h"
@@ skipping 10 matching lines @@
   virtual void SetWebMediaPlayerImplProxy(WebMediaPlayerImpl::Proxy* proxy) = 0;
 
   // This method is called with the same rect as the Paint() method and could
   // be used by future implementations to implement an improved color space +
   // scale code on a separate thread.  Since we always do the stretch on the
   // same thread as the Paint method, we just ignore the call for now.
   //
   // 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|.
   //
   // Method called on the render thread.
   virtual void Paint(skia::PlatformCanvas* canvas,
                      const gfx::Rect& dest_rect) = 0;
 
   // Clients of this class (painter/compositor) should use GetCurrentFrame()
   // obtain ownership of VideoFrame, it should always relinquish the ownership
   // by use PutCurrentFrame(). Current frame is not guaranteed to be non-NULL.
   // It expects clients to use color-fill the background if current frame
   // is NULL. This could happen when before pipeline is pre-rolled or during
   // pause/flush/seek.
   virtual void GetCurrentFrame(scoped_refptr<media::VideoFrame>* frame_out) {}
   virtual void PutCurrentFrame(scoped_refptr<media::VideoFrame> frame) {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebVideoRenderer);
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_GLUE_MEDIA_WEB_VIDEO_RENDERER_H_