Implement WebFrameScheduler and WebPageScheduler

components/scheduler/child/task_queue_impl.h

Index: components/scheduler/child/task_queue_impl.h
diff --git a/components/scheduler/child/task_queue_impl.h b/components/scheduler/child/task_queue_impl.h
index 7aef6caf46c722c74789aea707726ed656865294..0801c0438aa6c742f0a6d302397e4a17dfa96691 100644
--- a/components/scheduler/child/task_queue_impl.h
+++ b/components/scheduler/child/task_queue_impl.h
@@ -98,6 +98,8 @@ class SCHEDULER_EXPORT TaskQueueImpl final : public TaskQueue {
   }
 
   const char* GetName() const override;
+  void SetOrigin(const std::string& origin) override;
+  const std::string& GetOrigin() override;
 
   void AsValueInto(base::trace_event::TracedValue* state) const;
 
@@ -191,6 +193,7 @@ class SCHEDULER_EXPORT TaskQueueImpl final : public TaskQueue {
   PumpPolicy pump_policy_;
   std::priority_queue<Task> delayed_task_queue_;
 
+  std::string origin_;

[Sami, 2015/09/10 12:51:57]

Looks like origin_ is protected by the lock but it's not part of the group
above.

By the way, why do we need it to be thread safe?

[alex clarke (OOO till 29th), 2015/09/10 14:35:58]

Done.

   const char* name_;
   const char* disabled_by_default_tracing_category_;
   const char* disabled_by_default_verbose_tracing_category_;