Patch 1/3 to get WebScheduler via WebThread

content/renderer/scheduler/renderer_web_scheduler_impl.h

+// 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.
+
+#ifndef CONTENT_RENDERER_SCHEDULER_RENDERER_WEB_SCHEDULER_IMPL_H_
+#define CONTENT_RENDERER_SCHEDULER_RENDERER_WEB_SCHEDULER_IMPL_H_
+
+#include "content/child/scheduler/base_web_scheduler.h"
+
+namespace content {
+class RendererScheduler;
+
+class CONTENT_EXPORT RendererWebSchedulerImpl : public BaseWebScheduler {
+ public:
+  explicit RendererWebSchedulerImpl(RendererScheduler* renderer_scheduler);
+  ~RendererWebSchedulerImpl() override;
+
+  virtual bool shouldYieldForHighPriorityWork();
+  virtual bool canExceedIdleDeadlineIfRequired();
+
+ private:
+  RendererScheduler* renderer_scheduler_;  // NOT OWNED
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_SCHEDULER_RENDERER_WEB_SCHEDULER_IMPL_H_