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

Source/modules/device_orientation/DeviceSensorEventDispatcher.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 43 matching lines @@
 
 void DeviceSensorEventDispatcher::removeController(DeviceSensorEventController* controller)
 {
     // Do not actually remove the controller from the vector, instead zero them out.
     // The zeros are removed in these two cases:
     // 1. either immediately if we are not dispatching any events,
     // 2. or after didChangeDeviceMotion/Orientation has dispatched all events.
     // This is to correctly handle the re-entrancy case when a controller is destroyed
     // while in the didChangeDeviceMotion/Orientation method.
     size_t index = m_controllers.find(controller);
-    if (index == notFound)
+    if (index == kNotFound)
         return;
 
     m_controllers[index] = 0;
     m_needsPurge = true;
 
     if (!m_isDispatching)
         purgeControllers();
 }
 
 void DeviceSensorEventDispatcher::purgeControllers()
@@ skipping 10 matching lines @@
         }
     }
 
     m_needsPurge = false;
 
     if (m_controllers.isEmpty())
         stopListening();
 }
 
 } // namespace WebCore