Rename ExceptionCode constants to use the names in the spec (2/3)

Source/core/dom/DatasetDOMStringMap.cpp

 /*
  * Copyright (C) 2010 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 161 matching lines @@
         if (propertyNameMatchesAttributeName(name, attribute->localName()))
             return true;
     }
 
     return false;
 }
 
 void DatasetDOMStringMap::setItem(const String& name, const String& value, ExceptionCode& ec)
 {
     if (!isValidPropertyName(name)) {
-        ec = SYNTAX_ERR;
+        ec = SyntaxError;
         return;
     }
 
     m_element->setAttribute(convertPropertyNameToAttributeName(name), value, ec);
 }
 
 void DatasetDOMStringMap::deleteItem(const String& name, ExceptionCode& ec)
 {
     if (!isValidPropertyName(name)) {
-        ec = SYNTAX_ERR;
+        ec = SyntaxError;
         return;
     }
 
     m_element->removeAttribute(convertPropertyNameToAttributeName(name));
 }
 
 } // namespace WebCore