WTF::notFound looks too much like a local variable.

Source/core/svg/animation/SMILTimeContainer.cpp

 /*
  * Copyright (C) 2008 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 75 matching lines @@
     ASSERT(animation->timeContainer() == this);
 
 #ifndef NDEBUG
     ASSERT(!m_preventScheduledAnimationsChanges);
 #endif
 
     ElementAttributePair key(target, attributeName);
     AnimationsVector* scheduled = m_scheduledAnimations.get(key);
     ASSERT(scheduled);
     size_t idx = scheduled->find(animation);
-    ASSERT(idx != notFound);
+    ASSERT(idx != kNotFound);
     scheduled->remove(idx);
 }
 
 void SMILTimeContainer::notifyIntervalsChanged()
 {
     // Schedule updateAnimations() to be called asynchronously so multiple intervals
     // can change with updateAnimations() only called once at the end.
     startTimer(0);
 }
 
@@ skipping 224 matching lines @@
         animationsToApply[i]->applyResultsToTarget();
 
 #ifndef NDEBUG
     m_preventScheduledAnimationsChanges = false;
 #endif
 
     startTimer(earliestFireTime, animationFrameDelay);
 }
 
 }