Introduce WebTaskRunner Patch 2/5

components/scheduler/renderer/webthread_impl_for_renderer_scheduler.cc

 // 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 "components/scheduler/renderer/webthread_impl_for_renderer_scheduler.h"
 
 #include "components/scheduler/child/task_queue.h"
+#include "components/scheduler/child/web_task_runner_impl.h"
 #include "components/scheduler/renderer/renderer_scheduler.h"
 #include "components/scheduler/renderer/renderer_web_scheduler_impl.h"
 #include "third_party/WebKit/public/platform/WebTraceLocation.h"
 
 namespace scheduler {
 
 WebThreadImplForRendererScheduler::WebThreadImplForRendererScheduler(
     RendererScheduler* scheduler)
     : web_scheduler_(new RendererWebSchedulerImpl(scheduler)),
       task_runner_(scheduler->DefaultTaskRunner()),
       idle_task_runner_(scheduler->IdleTaskRunner()),
       scheduler_(scheduler),
-      thread_id_(base::PlatformThread::CurrentId()) {
-}
+      thread_id_(base::PlatformThread::CurrentId()),
+      default_web_task_runner_(
+          new WebTaskRunnerImpl(scheduler->DefaultTaskRunner())) {}
 
 WebThreadImplForRendererScheduler::~WebThreadImplForRendererScheduler() {
 }
 
 blink::PlatformThreadId WebThreadImplForRendererScheduler::threadId() const {
   return thread_id_;
 }
 
 blink::WebScheduler* WebThreadImplForRendererScheduler::scheduler() const {
   return web_scheduler_.get();
 }
 
 base::SingleThreadTaskRunner* WebThreadImplForRendererScheduler::TaskRunner()
     const {
   return task_runner_.get();
 }
 
 SingleThreadIdleTaskRunner* WebThreadImplForRendererScheduler::IdleTaskRunner()
     const {
   return idle_task_runner_.get();
 }
 
+blink::WebTaskRunner* WebThreadImplForRendererScheduler::taskRunner() {
+  return default_web_task_runner_.get();
+}
+
 void WebThreadImplForRendererScheduler::AddTaskObserverInternal(
     base::MessageLoop::TaskObserver* observer) {
   scheduler_->AddTaskObserver(observer);
 }
 
 void WebThreadImplForRendererScheduler::RemoveTaskObserverInternal(
     base::MessageLoop::TaskObserver* observer) {
   scheduler_->RemoveTaskObserver(observer);
 }
 
 }  // namespace scheduler