Patch 2/3 to get WebScheduler via WebThread

Source/platform/WebScheduler.cpp

+// 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 "config.h"
+#include "public/platform/WebScheduler.h"
+
+#include "public/platform/WebTraceLocation.h"
+#include "wtf/Assertions.h"
+#include "wtf/OwnPtr.h"
+
+namespace blink {
+
+namespace {
+class TaskRunner : public WebThread::Task {
+    WTF_MAKE_NONCOPYABLE(TaskRunner);
+public:
+    explicit TaskRunner(PassOwnPtr<WebScheduler::Task> task)
+        : m_task(task)
+    {
+    }
+
+    ~TaskRunner() override
+    {
+    }
+
+    // WebThread::Task implementation.
+    void run() override
+    {
+        (*m_task)();
+    }
+
+private:
+    OwnPtr<WebScheduler::Task> m_task;
+};
+
+class IdleTaskRunner : public WebThread::IdleTask {
+    WTF_MAKE_NONCOPYABLE(IdleTaskRunner);
+
+public:
+    explicit IdleTaskRunner(PassOwnPtr<WebScheduler::IdleTask> task)
+        : m_task(task)
+    {
+    }
+
+    ~IdleTaskRunner() override
+    {
+    }
+
+    // WebThread::IdleTask implementation.
+    void run(double deadlineSeconds) override
+    {
+        (*m_task)(deadlineSeconds);
+    }
+
+private:
+    OwnPtr<WebScheduler::IdleTask> m_task;
+};
+
+} // namespace
+
+void WebScheduler::postIdleTask(const WebTraceLocation& location, PassOwnPtr<IdleTask> idleTask)
+{
+    postIdleTask(location, new IdleTaskRunner(idleTask));
+}
+
+void WebScheduler::postNonNestableIdleTask(const WebTraceLocation& location, PassOwnPtr<IdleTask> idleTask)
+{
+    postNonNestableIdleTask(location, new IdleTaskRunner(idleTask));
+}
+
+void WebScheduler::postIdleTaskAfterWakeup(const WebTraceLocation& location, PassOwnPtr<IdleTask> idleTask)
+{
+    postIdleTaskAfterWakeup(location, new IdleTaskRunner(idleTask));
+}
+
+void WebScheduler::postLoadingTask(const WebTraceLocation& location, PassOwnPtr<Task> task)
+{
+    postLoadingTask(location, new TaskRunner(task));
+}
+
+} // namespace blink