Experimental: Remove chromium shared timers

content/renderer/scheduler/task_queue_selector.h

Index: content/renderer/scheduler/task_queue_selector.h
diff --git a/content/renderer/scheduler/task_queue_selector.h b/content/renderer/scheduler/task_queue_selector.h
index ad315806491ada4cd233416c0ee954e8ec30e986..ffa089fd0e376f7f5f24415846f0fdcc11607319 100644
--- a/content/renderer/scheduler/task_queue_selector.h
+++ b/content/renderer/scheduler/task_queue_selector.h
@@ -27,6 +27,19 @@ class TaskQueueSelector {
   virtual void RegisterWorkQueues(
       const std::vector<const base::TaskQueue*>& work_queues) = 0;
 
+  class TaskQueueSelectorObserver {
+   public:
+    virtual ~TaskQueueSelectorObserver() {}
+
+    // Called when a task queue transitions from disabled to enabled.
+    virtual void OnTaskQueueEnabled() = 0;
+  };
+
+  // Called once to register TaskQueueSelectorObserver. This function is called
+  // on the main thread.
+  virtual void RegisterTaskQueueObserver(
+      TaskQueueSelectorObserver* observer) = 0;
+
   // Called to choose the work queue from which the next task should be taken
   // and run. Return true if |out_queue| indicates the queue to service or
   // false to avoid running any task.