DevTools: simplify WI.CSSProperty and WI.CSSStyleDeclaration interfaces

Source/devtools/front_end/elements/MetricsSidebarPane.js

 /*
  * Copyright (C) 2007 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 406 matching lines @@
                 userValuePx += borderBox.top + borderBox.bottom + paddingBox.top + paddingBox.bottom;
 
             userInput = userValuePx + "px";
         }
 
         this.previousPropertyDataCandidate = null;
 
         var allProperties = this.inlineStyle.allProperties;
         for (var i = 0; i < allProperties.length; ++i) {
             var property = allProperties[i];
-            if (property.name !== context.styleProperty || property.inactive)
+            if (property.name !== context.styleProperty || !property.activeInStyle())
                 continue;
 
             this.previousPropertyDataCandidate = property;
             property.setValue(userInput, commitEditor, true, callback.bind(this));
             return;
         }
 
         this.inlineStyle.appendProperty(context.styleProperty, userInput, callback.bind(this));
 
         /**
@@ skipping 17 matching lines @@
     },
 
     editingCommitted: function(element, userInput, previousContent, context)
     {
         this.editingEnded(element, context);
         this._applyUserInput(element, userInput, previousContent, context, true);
     },
 
     __proto__: WebInspector.ElementsSidebarPane.prototype
 }