Extract nested and private classes from VideoCaptureBufferPool

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