Rename renderer() to layoutObject().

Source/core/html/shadow/ClearButtonElement.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:
  * 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 52 matching lines @@
         return;
     }
 
     if (!m_clearButtonOwner->shouldClearButtonRespondToMouseEvents()) {
         if (!event->defaultHandled())
             HTMLDivElement::defaultEventHandler(event);
         return;
     }
 
     if (event->type() == EventTypeNames::click) {
-        if (renderer() && renderer()->visibleToHitTesting()) {
+        if (layoutObject() && layoutObject()->visibleToHitTesting()) {
             m_clearButtonOwner->focusAndSelectClearButtonOwner();
             m_clearButtonOwner->clearValue();
             event->setDefaultHandled();
         }
     }
 
     if (!event->defaultHandled())
         HTMLDivElement::defaultEventHandler(event);
 }
 
 bool ClearButtonElement::isClearButtonElement() const
 {
     return true;
 }
 
 DEFINE_TRACE(ClearButtonElement)
 {
     visitor->trace(m_clearButtonOwner);
     HTMLDivElement::trace(visitor);
 }
 
 }