Make quoteCSSString an internal helper

Source/core/html/HTMLElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004-2008, 2013, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2011 Motorola Mobility. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 127 matching lines @@
 void HTMLElement::applyBorderAttributeToStyle(const AtomicString& value, MutableStylePropertySet* style)
 {
     addPropertyToPresentationAttributeStyle(style, CSSPropertyBorderWidth, parseBorderWidthAttribute(value), CSSPrimitiveValue::CSS_PX);
     addPropertyToPresentationAttributeStyle(style, CSSPropertyBorderStyle, CSSValueSolid);
 }
 
 void HTMLElement::mapLanguageAttributeToLocale(const AtomicString& value, MutableStylePropertySet* style)
 {
     if (!value.isEmpty()) {
         // Have to quote so the locale id is treated as a string instead of as a CSS keyword.
-        addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitLocale, quoteCSSString(value));
+        addPropertyToPresentationAttributeStyle(style, CSSPropertyWebkitLocale, serializeString(value));
 
         // FIXME: Remove the following UseCounter code when we collect enough
         // data.
         UseCounter::count(document(), UseCounter::LangAttribute);
         if (isHTMLHtmlElement(*this))
             UseCounter::count(document(), UseCounter::LangAttributeOnHTML);
         else if (isHTMLBodyElement(*this))
             UseCounter::count(document(), UseCounter::LangAttributeOnBody);
         String htmlLanguage = value.string();
         size_t firstSeparator = htmlLanguage.find('-');
@@ skipping 854 matching lines @@
 #ifndef NDEBUG
 
 // For use in the debugger
 void dumpInnerHTML(blink::HTMLElement*);
 
 void dumpInnerHTML(blink::HTMLElement* element)
 {
     printf("%s\n", element->innerHTML().ascii().data());
 }
 #endif