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

services/video_capture/mojo_shared_memory_buffer_handle.cc

Index: services/video_capture/mojo_shared_memory_buffer_handle.cc
diff --git a/services/video_capture/mojo_shared_memory_buffer_handle.cc b/services/video_capture/mojo_shared_memory_buffer_handle.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8ffd29bd3da4a2f1445ae183447cb8d36e1a5483
--- /dev/null
+++ b/services/video_capture/mojo_shared_memory_buffer_handle.cc
@@ -0,0 +1,45 @@
+// 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.
+
+#include "services/video_capture/mojo_shared_memory_buffer_handle.h"
+
+#include "services/video_capture/mojo_shared_memory_buffer_tracker.h"
+
+namespace video_capture {
+
+MojoSharedMemoryBufferHandle::MojoSharedMemoryBufferHandle(
+    MojoSharedMemoryBufferTracker* tracker)
+    : tracker_(tracker) {}
+
+MojoSharedMemoryBufferHandle::~MojoSharedMemoryBufferHandle() = default;
+
+gfx::Size MojoSharedMemoryBufferHandle::dimensions() const {
+  return tracker_->dimensions();
+}
+
+size_t MojoSharedMemoryBufferHandle::mapped_size() const {
+  return tracker_->mapped_size_;
+}
+
+void* MojoSharedMemoryBufferHandle::data(int plane) {
+  DCHECK_GE(plane, 0);
+  return tracker_->frame_->data(static_cast<size_t>(plane));
+}
+
+#if defined(OS_POSIX) && !defined(OS_MACOSX)
+base::FileDescriptor MojoSharedMemoryBufferHandle::AsPlatformFile() {
+  NOTREACHED();
+  return base::FileDescriptor();
+}
+#endif
+
+bool MojoSharedMemoryBufferHandle::IsBackedByVideoFrame() const {
+  return true;
+}
+
+scoped_refptr<media::VideoFrame> MojoSharedMemoryBufferHandle::GetVideoFrame() {
+  return tracker_->frame_;
+}
+
+}  // namespace video_capture