core: Include wtf files using "wtf/foo.h" form.

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 11 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef XMLErrors_h
 #define XMLErrors_h
 
-#include <wtf/text/StringBuilder.h>
-#include <wtf/text/TextPosition.h>
+#include "wtf/text/StringBuilder.h"
+#include "wtf/text/TextPosition.h"
 
 namespace WebCore {
 
 class Document;
 
 class XMLErrors {
 public:
     explicit XMLErrors(Document*);
 
     // Exposed for callbacks:
     enum ErrorType { warning, nonFatal, fatal };
     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);
 
     Document* m_document;
 
     int m_errorCount;
     TextPosition m_lastErrorPosition;
     StringBuilder m_errorMessages;
 };
 
 } // namespace WebCore
 
 #endif // XMLErrors_h