Add a WorkerScheduler and a WebThreadImplForWorker

content/child/webthread_impl.h

Index: content/child/webthread_impl.h
diff --git a/content/child/webthread_impl.h b/content/child/webthread_impl.h
index c50295253b473215cd384aa1703920626365cf6f..c6a3970ef3626a00dd6bdabb6eecd6aa5c92fe28 100644
--- a/content/child/webthread_impl.h
+++ b/content/child/webthread_impl.h
@@ -17,6 +17,7 @@ class WebTraceLocation;
 }
 
 namespace content {
+class SingleThreadIdleTaskRunner;
 
 class CONTENT_EXPORT WebThreadBase : public blink::WebThread {
  public:
@@ -30,6 +31,10 @@ class CONTENT_EXPORT WebThreadBase : public blink::WebThread {
   virtual void postDelayedTask(const blink::WebTraceLocation& location,
                                Task* task,
                                long long delay_ms);
+  virtual void postIdleTask(const blink::WebTraceLocation& location,
+                            IdleTask* idle_task);
+  virtual void postIdleTaskAfterWakeup(const blink::WebTraceLocation& location,
+                            IdleTask* idle_task);

[kinuko, 2015/04/02 13:03:08]

nit: indent

[alex clarke (OOO till 29th), 2015/04/02 15:19:28]

Done.

 
   virtual void enterRunLoop();
   virtual void exitRunLoop();
@@ -41,6 +46,10 @@ class CONTENT_EXPORT WebThreadBase : public blink::WebThread {
   // thread. Can be called from any thread.
   virtual base::SingleThreadTaskRunner* TaskRunner() const = 0;
 
+  // Returns the base::Bind-compatible task runner for posting idle tasks to
+  // this thread. Can be called from any thread.
+  virtual SingleThreadIdleTaskRunner* IdleTaskRunner() const = 0;
+
  protected:
   class TaskObserverAdapter;
 
@@ -57,29 +66,15 @@ class CONTENT_EXPORT WebThreadBase : public blink::WebThread {
       base::MessageLoop::TaskObserver* observer);
 
   static void RunWebThreadTask(scoped_ptr<blink::WebThread::Task> task);
+  static void RunWebThreadIdleTask(
+      scoped_ptr<blink::WebThread::IdleTask> idle_task,
+      base::TimeTicks deadline);
 
  private:
   typedef std::map<TaskObserver*, TaskObserverAdapter*> TaskObserverMap;
   TaskObserverMap task_observer_map_;
 };
 
-class CONTENT_EXPORT WebThreadImpl : public WebThreadBase {
- public:
-  explicit WebThreadImpl(const char* name);
-  virtual ~WebThreadImpl();
-
-  // blink::WebThread implementation.
-  blink::PlatformThreadId threadId() const override;
-
-  // WebThreadBase implementation.
-  base::SingleThreadTaskRunner* TaskRunner() const override;
-
- private:
-  base::MessageLoop* MessageLoop() const override;
-
-  scoped_ptr<base::Thread> thread_;
-};
-
 } // namespace content
 
 #endif  // CONTENT_CHILD_WEBTHREAD_IMPL_H_