Revert of [Mojo Video Capture] Simplify media::VideoCaptureDevice::Client:Buffer to a struct

services/video_capture/mojo_shared_memory_buffer_handle.h

Index: services/video_capture/mojo_shared_memory_buffer_handle.h
diff --git a/services/video_capture/mojo_shared_memory_buffer_handle.h b/services/video_capture/mojo_shared_memory_buffer_handle.h
new file mode 100644
index 0000000000000000000000000000000000000000..b684a86eb46993975b9f8f09fe617f638162ddc7
--- /dev/null
+++ b/services/video_capture/mojo_shared_memory_buffer_handle.h
@@ -0,0 +1,35 @@
+// 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 SERVICES_VIDEO_CAPTURE_MOJO_SHARED_MEMORY_BUFFER_HANDLE_H_
+#define SERVICES_VIDEO_CAPTURE_MOJO_SHARED_MEMORY_BUFFER_HANDLE_H_
+
+#include "media/capture/video/video_capture_buffer_handle.h"
+#include "media/mojo/common/mojo_shared_buffer_video_frame.h"
+
+namespace video_capture {
+
+class MojoSharedMemoryBufferTracker;
+
+class MojoSharedMemoryBufferHandle : public media::VideoCaptureBufferHandle {
+ public:
+  MojoSharedMemoryBufferHandle(MojoSharedMemoryBufferTracker* tracker);
+  ~MojoSharedMemoryBufferHandle() override;
+
+  gfx::Size dimensions() const override;
+  size_t mapped_size() const override;
+  void* data(int plane) override;
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
+  base::FileDescriptor AsPlatformFile() override;
+#endif
+  bool IsBackedByVideoFrame() const override;
+  scoped_refptr<media::VideoFrame> GetVideoFrame() override;
+
+ private:
+  MojoSharedMemoryBufferTracker* const tracker_;
+};
+
+}  // namespace video_capture
+
+#endif  // SERVICES_VIDEO_CAPTURE_MOJO_SHARED_MEMORY_BUFFER_HANDLE_H_