Revert of Add DeadlineOverrun step to the RendererSchedulerIdlePeriod trace event.

content/renderer/scheduler/renderer_scheduler_impl.cc

Index: content/renderer/scheduler/renderer_scheduler_impl.cc
diff --git a/content/renderer/scheduler/renderer_scheduler_impl.cc b/content/renderer/scheduler/renderer_scheduler_impl.cc
index 6f1b2b0d388df825de920d0c23b18904a1309918..fbd8cbe605c07dfd3b1a47f62f29c45e33b85fee 100644
--- a/content/renderer/scheduler/renderer_scheduler_impl.cc
+++ b/content/renderer/scheduler/renderer_scheduler_impl.cc
@@ -250,16 +250,6 @@
 }
 
 void RendererSchedulerImpl::EndIdlePeriod() {
-  bool is_tracing;
-  TRACE_EVENT_CATEGORY_GROUP_ENABLED("renderer.scheduler", &is_tracing);
-  if (is_tracing && base::TimeTicks::Now() > estimated_next_frame_begin_) {
-    TRACE_EVENT_ASYNC_STEP_INTO_WITH_TIMESTAMP0(
-        "renderer.scheduler",
-        "RendererSchedulerIdlePeriod",
-        this,
-        "DeadlineOverrun",
-        estimated_next_frame_begin_.ToInternalValue());
-  }
   TRACE_EVENT_ASYNC_END0("renderer.scheduler",
                          "RendererSchedulerIdlePeriod", this);
   main_thread_checker_.CalledOnValidThread();