[NotForReview] Convert accelerated JPEG Decoder IPC to Mojo

content/browser/renderer_host/media/video_capture_gpu_jpeg_decoder.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 CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_GPU_JPEG_DECODER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_GPU_JPEG_DECODER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/sequence_checker.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread.h"
 #include "content/common/content_export.h"
 #include "media/capture/video/video_capture_jpeg_decoder.h"
 #include "media/video/jpeg_decode_accelerator.h"
 
-namespace gpu {
-class GpuChannelHost;
-}
-
 namespace content {
 
 // Adapter to GpuJpegDecodeAccelerator for VideoCaptureDevice::Client. It takes
 // care of GpuJpegDecodeAccelerator creation, shared memory, and threading
 // issues.
 //
 // All public methods except JpegDecodeAccelerator::Client ones should be called
 // on the same thread. JpegDecodeAccelerator::Client methods should be called on
 // the IO thread.
 class CONTENT_EXPORT VideoCaptureGpuJpegDecoder
@@ skipping 20 matching lines @@
       base::TimeDelta timestamp,
       media::VideoCaptureDevice::Client::Buffer out_buffer) override;
 
   // JpegDecodeAccelerator::Client implementation.
   // These will be called on IO thread.
   void VideoFrameReady(int32_t buffer_id) override;
   void NotifyError(int32_t buffer_id,
                    media::JpegDecodeAccelerator::Error error) override;
 
  private:
-  // Initialization helper, to establish GPU channel.
-  static void EstablishGpuChannelOnUIThread(
-      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-      base::WeakPtr<VideoCaptureGpuJpegDecoder> weak_this);
-
-  static void GpuChannelEstablishedOnUIThread(
-      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-      base::WeakPtr<VideoCaptureGpuJpegDecoder> weak_this,
-      scoped_refptr<gpu::GpuChannelHost> established_channel_host);
-
-  void FinishInitialization(
-      scoped_refptr<gpu::GpuChannelHost> gpu_channel_host);
-
   // Returns true if the decoding of last frame is not finished yet.
   bool IsDecoding_Locked() const;
 
   // Records |decoder_status_| to histogram.
   void RecordInitDecodeUMA_Locked();
 
-  scoped_refptr<gpu::GpuChannelHost> gpu_channel_host_;
-
   // The underlying JPEG decode accelerator.
   std::unique_ptr<media::JpegDecodeAccelerator> decoder_;
 
   // The callback to run when decode succeeds.
   const DecodeDoneCB decode_done_cb_;
 
   const base::Callback<void(const std::string&)> send_log_message_cb_;
   bool has_received_decoded_frame_;
 
   // Guards |decode_done_closure_| and |decoder_status_|.
@@ skipping 15 matching lines @@
   STATUS decoder_status_;
 
   SEQUENCE_CHECKER(sequence_checker_);
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureGpuJpegDecoder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_GPU_JPEG_DECODER_H_