Remove base::NonThreadSafe now that all users are gone!!

media/gpu/vaapi_jpeg_decode_accelerator.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_VAAPI_JPEG_DECODE_ACCELERATOR_H_
 #define MEDIA_GPU_VAAPI_JPEG_DECODE_ACCELERATOR_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/lock.h"
-#include "base/threading/non_thread_safe.h"
 #include "base/threading/thread.h"
 #include "media/base/bitstream_buffer.h"
 #include "media/gpu/media_gpu_export.h"
 #include "media/gpu/shared_memory_region.h"
 #include "media/gpu/vaapi_jpeg_decoder.h"
 #include "media/gpu/vaapi_wrapper.h"
 #include "media/video/jpeg_decode_accelerator.h"
 
 namespace media {
 
@@ skipping 85 matching lines @@
 
   // The WeakPtrFactory for |weak_this_|.
   base::WeakPtrFactory<VaapiJpegDecodeAccelerator> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VaapiJpegDecodeAccelerator);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_VAAPI_JPEG_DECODE_ACCELERATOR_H_