[scheduler] Implement time-based cpu throttling.

third_party/WebKit/public/platform/scheduler/base/task_queue.h

Index: third_party/WebKit/public/platform/scheduler/base/task_queue.h
diff --git a/third_party/WebKit/public/platform/scheduler/base/task_queue.h b/third_party/WebKit/public/platform/scheduler/base/task_queue.h
index de0d22ce45eb4f5bf4373b8beef0c3378ac7b9c4..3b0ac8c972971ed79eb7ce73b32419ca598801b0 100644
--- a/third_party/WebKit/public/platform/scheduler/base/task_queue.h
+++ b/third_party/WebKit/public/platform/scheduler/base/task_queue.h
@@ -144,10 +144,15 @@ class BLINK_PLATFORM_EXPORT TaskQueue : public base::SingleThreadTaskRunner {
   // Returns true if the queue is completely empty.
   virtual bool IsEmpty() const = 0;
 
-  // Returns true if the queue has work that's ready to execute now. NOTE this
-  // must be called on the thread this TaskQueue was created by.
+  // Returns true if the queue has work that's ready to execute now.
+  // NOTE: this must be called on the thread this TaskQueue was created by.
   virtual bool HasPendingImmediateWork() const = 0;
 
+  // Returns true if the queue has delayed tasks which are not ready to run.
+  // If result is true, sets |wakeup| to the time of next delayed task.
+  // NOTE: this must be called on the thread this TaskQueue was created by.
+  virtual bool NextScheduledWakeUp(base::TimeTicks* wakeup) = 0;

[Sami, 2016/09/07 15:20:44]

nit: GetNext... to match the naming around here.

nit: wake_up

[altimin, 2016/09/09 15:43:58]

Done.

+
   // Can be called on any thread.
   virtual const char* GetName() const = 0;