Make event names of TRACE_EVENT_SAMPLING_STATE macros more descriptive

Source/platform/ThreadTimers.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 84 matching lines @@
             if (m_pendingSharedTimerFireTime <= currentMonotonicTime && nextFireTime <= currentMonotonicTime)
                 return;
         }
         m_pendingSharedTimerFireTime = nextFireTime;
         m_sharedTimer->setFireInterval(max(nextFireTime - currentMonotonicTime, 0.0));
     }
 }
 
 void ThreadTimers::sharedTimerFired()
 {
-    TRACE_EVENT_SET_SAMPLING_STATE("Blink", "Internal");
+    TRACE_EVENT_SET_SAMPLING_STATE("Blink", "BlinkInternal");
 
     // Redirect to non-static method.
     PlatformThreadData::current().threadTimers().sharedTimerFiredInternal();
 
     TRACE_EVENT_SET_SAMPLING_STATE("Blink", "Sleeping");
 }
 
 void ThreadTimers::sharedTimerFiredInternal()
 {
     // Do a re-entrancy check.
@@ skipping 29 matching lines @@
 
 void ThreadTimers::fireTimersInNestedEventLoop()
 {
     // Reset the reentrancy guard so the timers can fire again.
     m_firingTimers = false;
     updateSharedTimer();
 }
 
 } // namespace WebCore