tracing: remove sampling state profiler

third_party/WebKit/Source/platform/Timer.cpp

 /*
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 109 matching lines @@
     return;
 
   m_weakPtrFactory.revokeAll();
 
   TRACE_EVENT0("blink", "TimerBase::run");
 #if DCHECK_IS_ON()
   DCHECK_EQ(m_thread, currentThread())
       << "Timer posted by " << m_location.function_name() << " "
       << m_location.file_name() << " was run on a different thread";
 #endif
-  TRACE_EVENT_SET_SAMPLING_STATE("blink", "BlinkInternal");
 
   if (m_repeatInterval) {
     double now = timerMonotonicallyIncreasingTime();
     // This computation should be drift free, and it will cope if we miss a
     // beat, which can easily happen if the thread is busy.  It will also cope
     // if we get called slightly before m_unalignedNextFireTime, which can
     // happen due to lack of timer precision.
     double intervalToNextFireTime =
         m_repeatInterval - fmod(now - m_nextFireTime, m_repeatInterval);
     setNextFireTime(timerMonotonicallyIncreasingTime(), intervalToNextFireTime);
   } else {
     m_nextFireTime = 0;
   }
   fired();
-  TRACE_EVENT_SET_SAMPLING_STATE("blink", "Sleeping");
 }
 
 bool TimerBase::Comparator::operator()(const TimerBase* a,
                                        const TimerBase* b) const {
   return a->m_nextFireTime < b->m_nextFireTime;
 }
 
 // static
 double TimerBase::timerMonotonicallyIncreasingTime() const {
   return timerTaskRunner()->monotonicallyIncreasingVirtualTimeSeconds();
 }
 
 }  // namespace blink