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

webkit/glue/webmediaplayer_impl.h

Index: webkit/glue/webmediaplayer_impl.h
diff --git a/webkit/glue/webmediaplayer_impl.h b/webkit/glue/webmediaplayer_impl.h
index 8aa666114a04199de97dc22010363334cc1341e1..8075651126b2768627f689934489916e0ff909d0 100644
--- a/webkit/glue/webmediaplayer_impl.h
+++ b/webkit/glue/webmediaplayer_impl.h
@@ -104,6 +104,10 @@ class WebMediaPlayerImpl : public WebKit::WebMediaPlayer,
     void Paint(skia::PlatformCanvas* canvas, const gfx::Rect& dest_rect);
     void SetSize(const gfx::Rect& rect);
     void Detach();
+    void CopyBitmapToCanvas(const SkBitmap& bitmap,
+                            skia::PlatformCanvas* canvas,
+                            const gfx::Rect& dest_rect);
+    void GetCurrentBitmap(SkBitmap* bitmap);
     void GetCurrentFrame(scoped_refptr<media::VideoFrame>* frame_out);
     void PutCurrentFrame(scoped_refptr<media::VideoFrame> frame);
     bool HasSingleOrigin();
@@ -303,6 +307,7 @@ class WebMediaPlayerImpl : public WebKit::WebMediaPlayer,
   // clock can creep forward a little bit while the asynchronous
   // SetPlaybackRate(0) is being executed.
   bool paused_;
+  bool seeking_;
   float playback_rate_;
   base::TimeDelta paused_time_;
 
@@ -317,6 +322,9 @@ class WebMediaPlayerImpl : public WebKit::WebMediaPlayer,
   scoped_ptr<skia::PlatformCanvas> skia_canvas_;
 #endif
 
+  // Used to display the last available frame when seeking.
+  SkBitmap cached_bitmap_;
+
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };