Patch 1/3 to get WebScheduler via WebThread

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