scheduler: Move the Blink scheduler into Blink

third_party/WebKit/Source/platform/scheduler/child/web_task_runner_impl.h

Index: third_party/WebKit/Source/platform/scheduler/child/web_task_runner_impl.h
diff --git a/third_party/WebKit/Source/platform/scheduler/child/web_task_runner_impl.h b/third_party/WebKit/Source/platform/scheduler/child/web_task_runner_impl.h
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index 0000000000000000000000000000000000000000..ac3cfabebf7bcced4b512c0be55f6fe351686a3f
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+++ b/third_party/WebKit/Source/platform/scheduler/child/web_task_runner_impl.h
@@ -0,0 +1,57 @@
+// 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 THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WEB_TASK_RUNNER_IMPL_H_
+#define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WEB_TASK_RUNNER_IMPL_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/time/time.h"
+#include "public/platform/WebCommon.h"
+#include "public/platform/WebTaskRunner.h"
+
+namespace blink {
+namespace scheduler {
+class TaskQueue;
+
+class BLINK_PLATFORM_EXPORT WebTaskRunnerImpl : public WebTaskRunner {
+ public:
+  explicit WebTaskRunnerImpl(scoped_refptr<TaskQueue> task_queue);
+
+  ~WebTaskRunnerImpl() override;
+
+  // WebTaskRunner implementation:
+  void postTask(const WebTraceLocation& web_location,
+                WebTaskRunner::Task* task) override;
+  void postDelayedTask(const WebTraceLocation& web_location,
+                       WebTaskRunner::Task* task,
+                       double delayMs) override;
+  bool runsTasksOnCurrentThread() override;
+  double virtualTimeSeconds() const override;
+  double monotonicallyIncreasingVirtualTimeSeconds() const override;
+  std::unique_ptr<WebTaskRunner> clone() override;
+  base::SingleThreadTaskRunner* taskRunner() override;
+
+  // WebTaskRunner::Task should be wrapped by base::Passed() when
+  // used with base::Bind(). See https://crbug.com/551356.
+  // runTask() is a helper to call WebTaskRunner::Task::run from
+  // std::unique_ptr<WebTaskRunner::Task>.
+  // runTask() is placed here because std::unique_ptr<> cannot be used from
+  // Blink.
+  static void runTask(std::unique_ptr<WebTaskRunner::Task>);
+
+ private:
+  base::TimeTicks Now() const;
+
+  scoped_refptr<TaskQueue> task_queue_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebTaskRunnerImpl);
+};
+
+}  // namespace scheduler
+}  // namespace blink
+
+#endif  // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_CHILD_WEB_TASK_RUNNER_IMPL_H_