Introduce WebTaskRunner Patch 2/5

components/scheduler/child/web_task_runner_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 COMPONENTS_SCHEDULER_CHILD_WEB_TASK_RUNNER_H_
+#define COMPONENTS_SCHEDULER_CHILD_WEB_TASK_RUNNER_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/scheduler/scheduler_export.h"
+#include "third_party/WebKit/public/platform/WebTaskRunner.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}  // namespace base
+
+namespace scheduler {
+
+class SCHEDULER_EXPORT WebTaskRunnerImpl : public blink::WebTaskRunner {
+ public:
+  explicit WebTaskRunnerImpl(
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner);
+
+  ~WebTaskRunnerImpl() override;
+
+  const scoped_refptr<base::SingleThreadTaskRunner>& task_runner() const {
+    return task_runner_;
+  }
+
+  // blink::WebTaskRunner implementation:
+  virtual void postTask(const blink::WebTraceLocation& web_location,
+                        blink::WebTaskRunner::Task* task);
+  // TODO(alexclarke): Remove this when possible.
+  virtual void postDelayedTask(const blink::WebTraceLocation& web_location,
+                               blink::WebTaskRunner::Task* task,
+                               long long delayMs);
+  virtual void postDelayedTask(const blink::WebTraceLocation& web_location,
+                               blink::WebTaskRunner::Task* task,
+                               double delayMs);
+
+ private:
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebTaskRunnerImpl);
+};
+
+}  // namespace scheduler
+
+#endif  // COMPONENTS_SCHEDULER_CHILD_WEB_TASK_RUNNER_H_