content: Add RendererScheduler.

content/renderer/scheduler/renderer_scheduler.cc

+// Copyright 2014 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/renderer/scheduler/renderer_scheduler.h"
+
+#include "content/renderer/scheduler/null_renderer_scheduler.h"
+
+namespace content {
+
+RendererScheduler::RendererScheduler() {
+}
+
+RendererScheduler::~RendererScheduler() {
+}
+
+// static
+scoped_ptr<RendererScheduler> RendererScheduler::Create() {
+  // TODO(rmcilroy): Use the RendererSchedulerImpl when the scheduler is enabled
+  return make_scoped_ptr(new NullRendererScheduler());
+}
+
+}  // namespace content