Cleanup of video capture into GpuMemoryBuffer

content/browser/renderer_host/media/gpu_memory_buffer_handle.cc

-// 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 "content/browser/renderer_host/media/gpu_memory_buffer_handle.h"
-
-#include "content/browser/renderer_host/media/gpu_memory_buffer_tracker.h"
-
-namespace content {
-
-GpuMemoryBufferBufferHandle::GpuMemoryBufferBufferHandle(
-    GpuMemoryBufferTracker* tracker)
-    : tracker_(tracker) {}
-GpuMemoryBufferBufferHandle::~GpuMemoryBufferBufferHandle() = default;
-
-gfx::Size GpuMemoryBufferBufferHandle::dimensions() const {
-  return tracker_->dimensions();
-}
-
-size_t GpuMemoryBufferBufferHandle::mapped_size() const {
-  return tracker_->dimensions().GetArea();
-}
-
-void* GpuMemoryBufferBufferHandle::data(int plane) {
-  DCHECK_GE(plane, 0);
-  DCHECK_LT(plane, static_cast<int>(tracker_->gpu_memory_buffers_.size()));
-  DCHECK(tracker_->gpu_memory_buffers_[plane]);
-  return tracker_->gpu_memory_buffers_[plane]->memory(0);
-}
-
-ClientBuffer GpuMemoryBufferBufferHandle::AsClientBuffer(int plane) {
-  DCHECK_GE(plane, 0);
-  DCHECK_LT(plane, static_cast<int>(tracker_->gpu_memory_buffers_.size()));
-  return tracker_->gpu_memory_buffers_[plane]->AsClientBuffer();
-}
-
-#if defined(OS_POSIX) && !defined(OS_MACOSX)
-base::FileDescriptor GpuMemoryBufferBufferHandle::AsPlatformFile() {
-  NOTREACHED();
-  return base::FileDescriptor();
-}
-#endif
-
-}  // namespace content