Clean up some CSSPropertyID helpers

Source/core/css/parser/CSSPropertyParser.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 7523 matching lines @@
     unsigned length = string.length();
 
     if (!length)
         return CSSPropertyInvalid;
     if (length > maxCSSPropertyNameLength)
         return CSSPropertyInvalid;
 
     return string.is8Bit() ? unresolvedCSSPropertyID(string.characters8(), length) : unresolvedCSSPropertyID(string.characters16(), length);
 }
 
-CSSPropertyID cssPropertyID(const String& string)
-{
-    return resolveCSSPropertyID(unresolvedCSSPropertyID(string));
-}
-
-CSSPropertyID unresolvedCSSPropertyID(const CSSParserString& string)
-{
-    unsigned length = string.length();
-
-    if (!length)
-        return CSSPropertyInvalid;
-    if (length > maxCSSPropertyNameLength)
-        return CSSPropertyInvalid;
-
-    return string.is8Bit() ? unresolvedCSSPropertyID(string.characters8(), length) : unresolvedCSSPropertyID(string.characters16(), length);
-}
-
 template <typename CharacterType>
 static CSSValueID cssValueKeywordID(const CharacterType* valueKeyword, unsigned length)
 {
     char buffer[maxCSSValueKeywordLength + 1]; // 1 for null character
 
     for (unsigned i = 0; i != length; ++i) {
         CharacterType c = valueKeyword[i];
         if (c == 0 || c >= 0x7F)
             return CSSValueInvalid; // illegal character
         buffer[i] = WTF::toASCIILower(c);
@@ skipping 608 matching lines @@
         }
     }
 
     if (!list->length())
         return nullptr;
 
     return list.release();
 }
 
 } // namespace blink