Switch DRM platform to using a separate thread

ui/ozone/platform/drm/gpu/drm_thread_proxy.cc

+// Copyright 2015 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 "ui/ozone/platform/drm/gpu/drm_thread_proxy.h"
+
+#include "base/bind.h"
+#include "ui/ozone/platform/drm/gpu/drm_thread_message_proxy.h"
+#include "ui/ozone/platform/drm/gpu/drm_window_proxy.h"
+#include "ui/ozone/platform/drm/gpu/gbm_buffer.h"
+#include "ui/ozone/platform/drm/gpu/proxy_helpers.h"
+
+namespace ui {
+
+DrmThreadProxy::DrmThreadProxy() {}
+
+DrmThreadProxy::~DrmThreadProxy() {}
+
+scoped_refptr<DrmThreadMessageProxy>
+DrmThreadProxy::CreateDrmThreadMessageProxy() {
+  return make_scoped_refptr(new DrmThreadMessageProxy(&drm_thread_));
+}
+
+scoped_ptr<DrmWindowProxy> DrmThreadProxy::CreateDrmWindowProxy(
+    gfx::AcceleratedWidget widget) {
+  return make_scoped_ptr(new DrmWindowProxy(widget, &drm_thread_));
+}
+
+scoped_refptr<GbmBuffer> DrmThreadProxy::CreateBuffer(
+    gfx::AcceleratedWidget widget,
+    const gfx::Size& size,
+    gfx::BufferFormat format,
+    gfx::BufferUsage usage) {
+  scoped_refptr<GbmBuffer> buffer;
+  PostSyncTask(
+      drm_thread_.task_runner(),
+      base::Bind(&DrmThread::CreateBuffer, base::Unretained(&drm_thread_),
+                 widget, size, format, usage, &buffer));
+  return buffer;
+}
+
+}  // namespace ui