Patch 1/3 to get WebScheduler via WebThread

content/renderer/scheduler/webthread_impl_for_renderer_scheduler.cc

Index: content/renderer/scheduler/webthread_impl_for_renderer_scheduler.cc
diff --git a/content/renderer/scheduler/webthread_impl_for_renderer_scheduler.cc b/content/renderer/scheduler/webthread_impl_for_renderer_scheduler.cc
index 4855df19ef6aded31831d96e12f621a8113b92c6..d010ec62dce7e2e1802b96bffaa8867f7c545313 100644
--- a/content/renderer/scheduler/webthread_impl_for_renderer_scheduler.cc
+++ b/content/renderer/scheduler/webthread_impl_for_renderer_scheduler.cc
@@ -5,13 +5,15 @@
 #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()) {
@@ -24,6 +26,10 @@ 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();