Replace deprecated base::NonThreadSafe in media/gpu in favor of SequenceChecker.

media/gpu/ipc/client/gpu_jpeg_decode_accelerator_host.h

 // Copyright 2015 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 MEDIA_GPU_IPC_CLIENT_GPU_JPEG_DECODE_ACCELERATOR_HOST_H_
 #define MEDIA_GPU_IPC_CLIENT_GPU_JPEG_DECODE_ACCELERATOR_HOST_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
-#include "base/threading/non_thread_safe.h"
+#include "base/sequence_checker.h"
 #include "media/video/jpeg_decode_accelerator.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 namespace gpu {
 class GpuChannelHost;
 }
 
 namespace IPC {
 class Listener;
 class Message;
 }
 
 namespace media {
 
 // This class is used to talk to JpegDecodeAccelerator in the GPU process
 // through IPC messages.
-class GpuJpegDecodeAcceleratorHost : public JpegDecodeAccelerator,
-                                     public base::NonThreadSafe {
+class GpuJpegDecodeAcceleratorHost : public JpegDecodeAccelerator {
  public:
   GpuJpegDecodeAcceleratorHost(
       scoped_refptr<gpu::GpuChannelHost> channel,
       int32_t route_id,
       const scoped_refptr<base::SingleThreadTaskRunner>& io_task_runner);
   ~GpuJpegDecodeAcceleratorHost() override;
 
   // JpegDecodeAccelerator implementation.
   // |client| is called on the IO thread, but is never called into after the
   // GpuJpegDecodeAcceleratorHost is destroyed.
@@ skipping 12 matching lines @@
   scoped_refptr<gpu::GpuChannelHost> channel_;
 
   // Route ID for the associated decoder in the GPU process.
   int32_t decoder_route_id_;
 
   // GPU IO task runner.
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
   std::unique_ptr<Receiver> receiver_;
 
+  SEQUENCE_CHECKER(sequence_checker_);
+
   DISALLOW_COPY_AND_ASSIGN(GpuJpegDecodeAcceleratorHost);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_IPC_CLIENT_GPU_JPEG_DECODE_ACCELERATOR_HOST_H_