[scheduler] Teach scheduler about audio state

third_party/WebKit/Source/platform/scheduler/renderer/task_queue_throttler.h

Index: third_party/WebKit/Source/platform/scheduler/renderer/task_queue_throttler.h
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/task_queue_throttler.h b/third_party/WebKit/Source/platform/scheduler/renderer/task_queue_throttler.h
index b45838234f666987e5c0a0ff1972150c6582fdf2..486aea03ac59150e144e84330ca279dbccbe5c8e 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/task_queue_throttler.h
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/task_queue_throttler.h
@@ -179,9 +179,13 @@ class BLINK_PLATFORM_EXPORT TaskQueueThrottler : public TimeDomain::Observer {
   // Returns true if the |task_queue| is throttled.
   bool IsThrottled(TaskQueue* task_queue) const;
 
-  // Tells the TaskQueueThrottler we're using virtual time, which disables all
-  // throttling.
-  void EnableVirtualTime();
+  // Disable throttling for all queues, this setting takes precedence over
+  // all other throttling settings. Designed to be used when a global event
+  // disabling throttling happens (e.g. audio is playing).
+  void DisableThrottling();
+
+  // Enable back global throttling.
+  void EnableThrottling();
 
   const ThrottledTimeDomain* time_domain() const { return time_domain_.get(); }
 
@@ -260,7 +264,7 @@ class BLINK_PLATFORM_EXPORT TaskQueueThrottler : public TimeDomain::Observer {
 
   CancelableClosureHolder pump_throttled_tasks_closure_;
   base::Optional<base::TimeTicks> pending_pump_throttled_tasks_runtime_;
-  bool virtual_time_;
+  bool allow_throttling_;
 
   std::unordered_map<TimeBudgetPool*, std::unique_ptr<TimeBudgetPool>>
       time_budget_pools_;