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

Source/core/xml/XPathFunctions.cpp

 /*
  * Copyright (C) 2005 Frerich Raabe <raabe@kde.org>
  * Copyright (C) 2006, 2009 Apple Inc.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  *
  * 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
@@ skipping 16 matching lines @@
 
 #include "config.h"
 #include "core/xml/XPathFunctions.h"
 
 #include "XMLNames.h"
 #include "core/dom/Element.h"
 #include "core/dom/ProcessingInstruction.h"
 #include "core/dom/TreeScope.h"
 #include "core/xml/XPathUtil.h"
 #include "core/xml/XPathValue.h"
-#include <wtf/MathExtras.h>
-#include <wtf/text/StringBuilder.h>
+#include "wtf/MathExtras.h"
+#include "wtf/text/StringBuilder.h"
 
 namespace WebCore {
 namespace XPath {
 
 static inline bool isWhitespace(UChar c)
 {
     return c == ' ' || c == '\n' || c == '\r' || c == '\t';
 }
 
 
@@ skipping 675 matching lines @@
         return 0;
 
     Function* function = functionRec->factoryFn();
     function->setArguments(args);
     function->setName(name);
     return function;
 }
 
 }
 }