rendering_helper - Drop frames if the decoder cannot catch up.

content/common/gpu/media/rendering_helper.h

Index: content/common/gpu/media/rendering_helper.h
diff --git a/content/common/gpu/media/rendering_helper.h b/content/common/gpu/media/rendering_helper.h
index 1ebc91bf1b65cc472a98320894666101eab3189b..6db542f03a633d4edc4d2406790053a90770500c 100644
--- a/content/common/gpu/media/rendering_helper.h
+++ b/content/common/gpu/media/rendering_helper.h
@@ -134,6 +134,9 @@ class RenderingHelper {
     // True if there won't be any new video frames comming.
     bool is_flushing;
 
+    // The number of frames need to be dropped to catch up the rendering.
+    int frames_to_drop;
+
     // The video frames pending for rendering.
     std::queue<scoped_refptr<VideoFrameTexture> > pending_frames;