[scheduler] Implement time-based cpu throttling.

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

Index: third_party/WebKit/public/platform/scheduler/base/task_time_observer.h
diff --git a/third_party/WebKit/public/platform/scheduler/base/task_time_observer.h b/third_party/WebKit/public/platform/scheduler/base/task_time_observer.h
index 5ea6fec704f0373144b82b94abc3d2f9721e9ff7..cdb24f07b71df96fa27a59c41fb72917383d7092 100644
--- a/third_party/WebKit/public/platform/scheduler/base/task_time_observer.h
+++ b/third_party/WebKit/public/platform/scheduler/base/task_time_observer.h
@@ -11,12 +11,16 @@
 namespace blink {
 namespace scheduler {
 
+class TaskQueue;
+
 class BLINK_PLATFORM_EXPORT TaskTimeObserver {
  public:
   TaskTimeObserver() {}
   virtual ~TaskTimeObserver() {}
 
-  virtual void ReportTaskTime(double startTime, double endTime) = 0;
+  virtual void ReportTaskTime(TaskQueue* task_queue,
+                              base::TimeTicks start_time,
+                              base::TimeTicks end_time) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TaskTimeObserver);