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..79ee88f564684c22f453d70e1fcb353fed2b66ae 100644
--- a/content/renderer/scheduler/webthread_impl_for_renderer_scheduler.cc
+++ b/content/renderer/scheduler/webthread_impl_for_renderer_scheduler.cc
@@ -4,6 +4,7 @@
 
 #include "content/renderer/scheduler/webthread_impl_for_renderer_scheduler.h"
 
+#include "content/child/scheduler/web_scheduler_impl.h"
 #include "content/renderer/scheduler/renderer_scheduler.h"
 #include "third_party/WebKit/public/platform/WebTraceLocation.h"
 
@@ -11,7 +12,11 @@ namespace content {
 
 WebThreadImplForRendererScheduler::WebThreadImplForRendererScheduler(
     RendererScheduler* scheduler)
-    : task_runner_(scheduler->DefaultTaskRunner()),
+    : web_scheduler_(new WebSchedulerImpl(scheduler,
+                                          scheduler->IdleTaskRunner(),
+                                          scheduler->LoadingTaskRunner(),
+                                          scheduler->TimerTaskRunner())),
+      task_runner_(scheduler->DefaultTaskRunner()),
       idle_task_runner_(scheduler->IdleTaskRunner()),
       scheduler_(scheduler),
       thread_id_(base::PlatformThread::CurrentId()) {
@@ -24,6 +29,10 @@ 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();