[scheduler] Implement time-based cpu throttling.

third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc

Index: third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc b/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc
index 49ac60aaf8615b005b624f0b3dcf14fddc1003e1..e6141e63b68414a86b954c5d851bb1d742fda9a5 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/web_frame_scheduler_impl.cc
@@ -77,6 +77,7 @@ blink::WebTaskRunner* WebFrameSchedulerImpl::loadingTaskRunner() {
     loading_task_queue_ =
         renderer_scheduler_->NewLoadingTaskRunner("frame_loading_tq");
     loading_task_queue_->SetBlameContext(blame_context_);
+
     loading_web_task_runner_.reset(new WebTaskRunnerImpl(loading_task_queue_));
   }
   return loading_web_task_runner_.get();
@@ -88,8 +89,9 @@ blink::WebTaskRunner* WebFrameSchedulerImpl::timerTaskRunner() {
     timer_task_queue_ =
         renderer_scheduler_->NewTimerTaskRunner("frame_timer_tq");
     timer_task_queue_->SetBlameContext(blame_context_);
+
     if (ShouldThrottleTimers()) {
-      renderer_scheduler_->throttling_helper()->IncreaseThrottleRefCount(
+      renderer_scheduler_->task_queue_throttler()->IncreaseThrottleRefCount(
           timer_task_queue_.get());
     }
     timer_web_task_runner_.reset(new WebTaskRunnerImpl(timer_task_queue_));
@@ -152,10 +154,10 @@ void WebFrameSchedulerImpl::UpdateTimerThrottling(bool was_throttled) {
   if (was_throttled == should_throttle || !timer_web_task_runner_)
     return;
   if (should_throttle) {
-    renderer_scheduler_->throttling_helper()->IncreaseThrottleRefCount(
+    renderer_scheduler_->task_queue_throttler()->IncreaseThrottleRefCount(
         timer_task_queue_.get());
   } else {
-    renderer_scheduler_->throttling_helper()->DecreaseThrottleRefCount(
+    renderer_scheduler_->task_queue_throttler()->DecreaseThrottleRefCount(
         timer_task_queue_.get());
   }
 }