Let clients interact with VideoCaptureDeviceClient instead of VideoCaptureDevice

services/video_capture/mojo_shared_memory_buffer_tracker.h

 // Copyright 2016 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_SHARED_MEMORY_BUFFER_TRACKER_H_
-#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_SHARED_MEMORY_BUFFER_TRACKER_H_
+#ifndef SERVICES_VIDEO_CAPTURE_MOJO_SHARED_MEMORY_BUFFER_TRACKER_H_
+#define SERVICES_VIDEO_CAPTURE_MOJO_SHARED_MEMORY_BUFFER_TRACKER_H_
 
 #include "media/capture/video/video_capture_buffer_tracker.h"
+#include "media/mojo/common/mojo_shared_buffer_video_frame.h"
 
-namespace content {
+namespace video_capture {
 
-// Tracker specifics for SharedMemory.
-class SharedMemoryBufferTracker final
+// Tracker specifics for MojoSharedMemory.
+class MojoSharedMemoryBufferTracker final
     : public media::VideoCaptureBufferTracker {
  public:
-  SharedMemoryBufferTracker();
+  MojoSharedMemoryBufferTracker();
+  ~MojoSharedMemoryBufferTracker() override;
 
+  // Implementation of media::VideoCaptureBufferTracker
   bool Init(const gfx::Size& dimensions,
             media::VideoPixelFormat format,
             media::VideoPixelStorage storage_type,
             base::Lock* lock) override;
-
   std::unique_ptr<media::VideoCaptureBufferHandle> GetBufferHandle() override;
   bool ShareToProcess(base::ProcessHandle process_handle,
                       base::SharedMemoryHandle* new_handle) override;
   bool ShareToProcess2(int plane,
                        base::ProcessHandle process_handle,
                        gfx::GpuMemoryBufferHandle* new_handle) override;
 
  private:
-  friend class SharedMemoryBufferHandle;
+  friend class MojoSharedMemoryBufferHandle;
 
-  // The memory created to be shared with renderer processes.
-  base::SharedMemory shared_memory_;
+  scoped_refptr<media::MojoSharedBufferVideoFrame> frame_;
   size_t mapped_size_;
 };
 
-}  // namespace content
+}  // namespace video_capture
 
-#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_SHARED_MEMORY_BUFFER_TRACKER_H_
+#endif  // SERVICES_VIDEO_CAPTURE_MOJO_SHARED_MEMORY_BUFFER_TRACKER_H_