Fix input frames being dropped when the h.264 DXVA decoder detects a configuration change.

content/common/gpu/media/dxva_video_decode_accelerator_win.h

Index: content/common/gpu/media/dxva_video_decode_accelerator_win.h
diff --git a/content/common/gpu/media/dxva_video_decode_accelerator_win.h b/content/common/gpu/media/dxva_video_decode_accelerator_win.h
index 9dba785eb044350d4c8c701cc8695ac0ddaa38a7..56087b335e8856640b1e69e41bb8fc8ede617aef 100644
--- a/content/common/gpu/media/dxva_video_decode_accelerator_win.h
+++ b/content/common/gpu/media/dxva_video_decode_accelerator_win.h
@@ -92,6 +92,7 @@ class CONTENT_EXPORT DXVAVideoDecodeAccelerator
     kResetting,                   // upon received Reset(), before ResetDone()
     kStopped,                     // upon output EOS received.
     kFlushing,                    // upon flush request received.
+    kConfigChange,                // stream configuration change detected.
   };
 
   // Does not take ownership of |client| which must outlive |*this|.
@@ -305,8 +306,7 @@ class CONTENT_EXPORT DXVAVideoDecodeAccelerator
 
   // Called when we detect a stream configuration change. We reinitialize the
   // decoder here.
-  void ConfigChanged(const Config& config,
-                     const base::win::ScopedComPtr<IMFSample>& input_sample);
+  void ConfigChanged(const Config& config);
 
   // To expose client callbacks from VideoDecodeAccelerator.
   media::VideoDecodeAccelerator::Client* client_;