DevTools: simplify WI.CSSProperty and WI.CSSStyleDeclaration interfaces

Source/devtools/front_end/audits/AuditRules.js

 /*
  * Copyright (C) 2010 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 883 matching lines @@
                     }
                 }
             }
             if (completeSrc)
                 src = completeSrc;
 
             if (styles.computedStyle.get("position") === "absolute")
                 return;
 
             if (styles.attributesStyle) {
-                var widthFound = !!styles.attributesStyle.getLiveProperty("width");
-                var heightFound = !!styles.attributesStyle.getLiveProperty("height");
+                var widthFound = !!styles.attributesStyle.getPropertyValue("width");
+                var heightFound = !!styles.attributesStyle.getPropertyValue("height");
             }
 
             var inlineStyle = styles.inlineStyle;
             if (inlineStyle) {
                 if (inlineStyle.getPropertyValue("width") !== "")
                     widthFound = true;
                 if (inlineStyle.getPropertyValue("height") !== "")
                     heightFound = true;
             }
 
@@ skipping 731 matching lines @@
         result.violationCount = badUrls.length;
     },
 
     _collectorCallback: function(matchingResourceData, request, cookie)
     {
         matchingResourceData[request.url] = (matchingResourceData[request.url] || 0) + cookie.size();
     },
 
     __proto__: WebInspector.AuditRules.CookieRuleBase.prototype
 }