Workaround for DXVA incorrectly claiming to be done with Decode() too soon.

media/filters/gpu_video_decoder.h

Index: media/filters/gpu_video_decoder.h
diff --git a/media/filters/gpu_video_decoder.h b/media/filters/gpu_video_decoder.h
index ce86ffc4e314d540d624f805886ea03c49ebca5e..bffe5ef6269306f7579a737c7fd1a0025f7bfbab 100644
--- a/media/filters/gpu_video_decoder.h
+++ b/media/filters/gpu_video_decoder.h
@@ -102,6 +102,9 @@ class MEDIA_EXPORT GpuVideoDecoder
   // decoder, kick some off demuxing/decoding.
   void EnsureDemuxOrDecode();
 
+  // Return true if more decode work can be piled on to the VDA.
+  bool CanMoreDecodeWorkBeDone();
+
   // Callback to pass to demuxer_stream_->Read() for receiving encoded bits.
   void RequestBufferDecode(DemuxerStream::Status status,
                            const scoped_refptr<DecoderBuffer>& buffer);