Use NotifyError() to report errors in VTVideoDecodeAccelerator.

content/common/gpu/media/vt_video_decode_accelerator.h

Index: content/common/gpu/media/vt_video_decode_accelerator.h
diff --git a/content/common/gpu/media/vt_video_decode_accelerator.h b/content/common/gpu/media/vt_video_decode_accelerator.h
index 572f4d3324da0dd1e07efcabaa924380ec9b6466..ced436994f39d2db5d933052d6a850d9d43ca2d4 100644
--- a/content/common/gpu/media/vt_video_decode_accelerator.h
+++ b/content/common/gpu/media/vt_video_decode_accelerator.h
@@ -83,15 +83,17 @@ class VTVideoDecodeAccelerator
   };
 
   // Methods for interacting with VideoToolbox. Run on |decoder_thread_|.
-  void ConfigureDecoder(
+  bool ConfigureDecoder(
       const std::vector<const uint8_t*>& nalu_data_ptrs,
       const std::vector<size_t>& nalu_data_sizes);
-  void DecodeTask(const media::BitstreamBuffer);
+  void DecodeTask(const media::BitstreamBuffer&);
   void FlushTask();
+  void DropBitstream(int32_t bitstream_id);
 
   // Methods for interacting with |client_|. Run on |gpu_task_runner_|.
   void OutputTask(DecodedFrame frame);
   void SizeChangedTask(gfx::Size coded_size);
+  void NotifyError(Error error);
 
   // Send decoded frames up to and including |up_to_bitstream_id|, and return
   // the last sent |bitstream_id|.
@@ -122,6 +124,7 @@ class VTVideoDecodeAccelerator
   //
   CGLContextObj cgl_context_;
   media::VideoDecodeAccelerator::Client* client_;
+  bool has_error_;  // client_->NotifyError() called.
   gfx::Size texture_size_;
   std::queue<PendingAction> pending_actions_;
   std::queue<int32_t> pending_bitstream_ids_;