Experimental: Remove chromium shared timers

content/renderer/scheduler/renderer_task_queue_selector.h

Index: content/renderer/scheduler/renderer_task_queue_selector.h
diff --git a/content/renderer/scheduler/renderer_task_queue_selector.h b/content/renderer/scheduler/renderer_task_queue_selector.h
index 72bbc62874047085e99102f29da4c73b47bad2e0..0ce3926c6f62630f6e4cb054c25d2801b24e87da 100644
--- a/content/renderer/scheduler/renderer_task_queue_selector.h
+++ b/content/renderer/scheduler/renderer_task_queue_selector.h
@@ -48,8 +48,9 @@ class CONTENT_EXPORT RendererTaskQueueSelector
   // queues are enabled with normal priority.
   void EnableQueue(size_t queue_index, QueuePriority priority);
 
-  // Disable the |queue_index|.
-  void DisableQueue(size_t queue_index);
+  // Disable the |queue_index|. Returns true if the queue was previously enabled
+  // otherwise returns false.
+  bool DisableQueue(size_t queue_index);
 
   // Whether |queue_index| is enabled.
   bool IsQueueEnabled(size_t queue_index) const;
@@ -59,6 +60,7 @@ class CONTENT_EXPORT RendererTaskQueueSelector
       const std::vector<const base::TaskQueue*>& work_queues) override;
   bool SelectWorkQueueToService(size_t* out_queue_index) override;
   void AsValueInto(base::trace_event::TracedValue* state) const override;
+  void RegisterTaskQueueObserver(TaskQueueSelectorObserver* observer) override;
 
  private:
   // Returns true if queueA contains an older task than queueB.
@@ -93,6 +95,7 @@ class CONTENT_EXPORT RendererTaskQueueSelector
   std::vector<const base::TaskQueue*> work_queues_;
   std::set<size_t> queue_priorities_[QUEUE_PRIORITY_COUNT];
   size_t starvation_count_;
+  TaskQueueSelectorObserver* task_queue_selector_observer_;  // NOT OWNED
   DISALLOW_COPY_AND_ASSIGN(RendererTaskQueueSelector);
 };