[scheduler] Implement time-based cpu throttling.

third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc

Index: third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc b/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc
index f44ee457a87e5189ddb438b495d6db1920f95be9..34c118fc80374e97dd23bdccceff356c7cb82ca1 100644
--- a/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc
+++ b/third_party/WebKit/Source/platform/scheduler/base/task_queue_manager.cc
@@ -226,9 +226,11 @@ void TaskQueueManager::DoWork(base::TimeTicks run_time, bool from_main_thread) {
     if (!delegate_->IsNested() && task_start_time != base::TimeTicks()) {
       // Only report top level task durations.
       base::TimeTicks task_end_time = lazy_now.Now();
+
       FOR_EACH_OBSERVER(TaskTimeObserver, task_time_observers_,
-                        ReportTaskTime(MonotonicTimeInSeconds(task_start_time),
-                                       MonotonicTimeInSeconds(task_end_time)));
+                        ReportTaskTime(work_queue->task_queue(),
+                                       task_start_time, task_end_time));
+
       task_start_time = task_end_time;
     }