Add support for disabling CSS Properties at runtime

Source/core/css/CSSParser.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 1266 matching lines @@
         return true;
     if (parseTranslateTransformValue(declaration, propertyID, string, important))
         return true;
 
     CSSParser parser(context);
     return parser.parseValue(declaration, propertyID, string, important, contextStyleSheet);
 }
 
 bool CSSParser::parseValue(StylePropertySet* declaration, CSSPropertyID propertyID, const String& string, bool important, StyleSheetContents* contextStyleSheet)
 {
+    // FIXME: Check RuntimeCSSEnabled::isPropertyEnabled or isValueEnabledForProperty.
+
     setStyleSheet(contextStyleSheet);
 
     setupParser("@-internal-value{", string, "} ");
 
     m_id = propertyID;
     m_important = important;
 
     cssyyparse(this);
 
     m_rule = 0;
@@ skipping 10424 matching lines @@
 {
     // The tokenizer checks for the construct of an+b.
     // However, since the {ident} rule precedes the {nth} rule, some of those
     // tokens are identified as string literal. Furthermore we need to accept
     // "odd" and "even" which does not match to an+b.
     return equalIgnoringCase(token, "odd") || equalIgnoringCase(token, "even")
         || equalIgnoringCase(token, "n") || equalIgnoringCase(token, "-n");
 }
 
 }