Fix style errors in core/xml/.

Source/core/xml/XMLErrors.h

 /*
  * Copyright (C) 2011 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.
  *
@@ skipping 26 matching lines @@
 
 class Document;
 
 class XMLErrors {
     DISALLOW_ALLOCATION();
 public:
     explicit XMLErrors(Document*);
     void trace(Visitor*);
 
     // Exposed for callbacks:
-    enum ErrorType { warning, nonFatal, fatal };
+    enum ErrorType { ErrorTypeWarning, ErrorTypeNonFatal, ErrorTypeFatal };
     void handleError(ErrorType, const char* message, int lineNumber, int columnNumber);
     void handleError(ErrorType, const char* message, TextPosition);
 
     void insertErrorMessageBlock();
 
 private:
     void appendErrorMessage(const String& typeString, TextPosition, const char* message);
 
     RawPtrWillBeMember<Document> m_document;
 
     int m_errorCount;
     TextPosition m_lastErrorPosition;
     StringBuilder m_errorMessages;
 };
 
 } // namespace WebCore
 
 #endif // XMLErrors_h