Patch 1/3 to get WebScheduler via WebThread

content/child/scheduler/webthread_impl_for_worker_scheduler.h

Index: content/child/scheduler/webthread_impl_for_worker_scheduler.h
diff --git a/content/child/scheduler/webthread_impl_for_worker_scheduler.h b/content/child/scheduler/webthread_impl_for_worker_scheduler.h
index 25362d78ce87ba527b25d552242b374d33b3601e..99fa75c9eb5be6b39296d2fde685890176a7aec3 100644
--- a/content/child/scheduler/webthread_impl_for_worker_scheduler.h
+++ b/content/child/scheduler/webthread_impl_for_worker_scheduler.h
@@ -12,10 +12,15 @@ namespace base {
 class WaitableEvent;
 };
 
+namespace blink {
+class WebScheduler;
+};
+
 namespace content {
 
 class SingleThreadIdleTaskRunner;
 class WorkerScheduler;
+class WorkerWebSchedulerImpl;
 
 class CONTENT_EXPORT WebThreadImplForWorkerScheduler : public WebThreadBase {
  public:
@@ -23,6 +28,7 @@ class CONTENT_EXPORT WebThreadImplForWorkerScheduler : public WebThreadBase {
   virtual ~WebThreadImplForWorkerScheduler();
 
   // blink::WebThread implementation.
+  virtual blink::WebScheduler* scheduler() const;
   blink::PlatformThreadId threadId() const override;
 
   // WebThreadBase implementation.
@@ -41,6 +47,7 @@ class CONTENT_EXPORT WebThreadImplForWorkerScheduler : public WebThreadBase {
 
   scoped_ptr<base::Thread> thread_;
   scoped_ptr<WorkerScheduler> worker_scheduler_;
+  scoped_ptr<WorkerWebSchedulerImpl> web_scheduler_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   scoped_refptr<SingleThreadIdleTaskRunner> idle_task_runner_;
 };