Merge 136803

Source/WebCore/html/shadow/DateTimeSymbolicFieldElement.cpp

 /*
  * Copyright (C) 2012 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 89 matching lines @@
     return static_cast<int>(m_symbols.size());
 }
 
 int DateTimeSymbolicFieldElement::minimum() const
 {
     return 1;
 }
 
 void DateTimeSymbolicFieldElement::setEmptyValue(EventBehavior eventBehavior)
 {
+    if (isReadOnly())
+        return;
     m_selectedIndex = invalidIndex;
     updateVisibleValue(eventBehavior);
 }
 
 void DateTimeSymbolicFieldElement::setValueAsInteger(int newSelectedIndex, EventBehavior eventBehavior)
 {
     m_selectedIndex = std::max(0, std::min(newSelectedIndex, static_cast<int>(m_symbols.size() - 1)));
     updateVisibleValue(eventBehavior);
 }
 
@@ skipping 26 matching lines @@
 }
 
 String DateTimeSymbolicFieldElement::visibleValue() const
 {
     return hasValue() ? m_symbols[m_selectedIndex] : visibleEmptyValue();
 }
 
 } // namespace WebCore
 
 #endif