Don't force a full decoder reset on seek in VTVDA.

content/common/gpu/media/vt_video_decode_accelerator_mac.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_VT_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_VT_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 237 matching lines @@
   base::ScopedCFTypeRef<VTDecompressionSessionRef> session_;
   media::H264Parser parser_;
   gfx::Size coded_size_;
 
   int last_sps_id_;
   std::vector<uint8_t> last_sps_;
   std::vector<uint8_t> last_spsext_;
   int last_pps_id_;
   std::vector<uint8_t> last_pps_;
   bool config_changed_;
+  bool waiting_for_idr_;
   bool missing_idr_logged_;
   media::H264POC poc_;
 
   //
   // Shared state (set up and torn down on GPU thread).
   //
   scoped_refptr<base::SingleThreadTaskRunner> gpu_task_runner_;
   base::ThreadChecker gpu_thread_checker_;
   base::WeakPtr<VTVideoDecodeAccelerator> weak_this_;
   base::Thread decoder_thread_;
 
   // Declared last to ensure that all weak pointers are invalidated before
   // other destructors run.
   base::WeakPtrFactory<VTVideoDecodeAccelerator> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VTVideoDecodeAccelerator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_VT_VIDEO_DECODE_ACCELERATOR_H_