Implement common Ozone interface for Chromecast.

chromecast/ozone/gpu_platform_support_chromecast.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 "chromecast/ozone/gpu_platform_support_chromecast.h"
+
+#include "chromecast/ozone/surface_factory_chromecast.h"
+
+namespace chromecast {
+namespace ozone {
+
+bool GpuPlatformSupportChromecast::OnMessageReceived(const IPC::Message& msg) {
+  return false;
+}
+
+void GpuPlatformSupportChromecast::RelinquishGpuResources(
+    const base::Closure& callback) {
+  parent_->SetToRelinquishDisplay(callback);
+}
+
+IPC::MessageFilter* GpuPlatformSupportChromecast::GetMessageFilter() {
+  return nullptr;
+}
+
+}  // namespace ozone
+}  // namespace chromecast