DevTools: slightly cleanup WI.CSSRule interface

Source/devtools/front_end/elements/StylesSidebarPane.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * 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.
@@ skipping 524 matching lines @@
         // Inline style has the greatest specificity.
         if (styles.inlineStyle && node.nodeType() === Node.ELEMENT_NODE) {
             var model = cascade.appendModelFromStyle(styles.inlineStyle, "element.style");
             model.setIsAttribute(true);
         }
 
         // Add rules in reverse order to match the cascade order.
         var addedAttributesStyle;
         for (var i = styles.matchedCSSRules.length - 1; i >= 0; --i) {
             var rule = styles.matchedCSSRules[i];
-            if ((rule.isInjected || rule.isUserAgent) && !addedAttributesStyle) {
+            if ((rule.isInjected() || rule.isUserAgent()) && !addedAttributesStyle) {
                 // Show element's Style Attributes after all author rules.
                 addedAttributesStyle = true;
                 addAttributesStyle();
             }
             cascade.appendModelFromRule(rule);
         }
 
         if (!addedAttributesStyle)
             addAttributesStyle();
 
@@ skipping 441 matching lines @@
         newRuleButton.title = WebInspector.UIString("Insert Style Rule");
         newRuleButton.addEventListener("click", this._onNewRuleClick.bind(this), false);
     }
 
     this._selectorElement.addEventListener("click", this._handleSelectorClick.bind(this), false);
     this.element.addEventListener("mousedown", this._handleEmptySpaceMouseDown.bind(this), false);
     this.element.addEventListener("click", this._handleEmptySpaceClick.bind(this), false);
 
     if (rule) {
         // Prevent editing the user agent and user rules.
-        if (rule.isUserAgent || rule.isInjected) {
+        if (rule.isUserAgent() || rule.isInjected()) {
             this.editable = false;
         } else {
             // Check this is a real CSSRule, not a bogus object coming from WebInspector.BlankStylePropertiesSection.
             if (rule.styleSheetId)
                 this.navigable = !!rule.resourceURL();
         }
     }
 
     this._selectorRefElement = createElementWithClass("div", "styles-section-subtitle");
     this._mediaListElement = this._titleElement.createChild("div", "media-list media-matches");
@@ skipping 684 matching lines @@
     if (!rule)
         return createTextNode("");
 
     var firstMatchingIndex = rule.matchingSelectors && rule.matchingSelectors.length ? rule.matchingSelectors[0] : 0;
     var ruleLocation = rule.selectors[firstMatchingIndex].range;
 
     var header = rule.styleSheetId ? cssModel.styleSheetHeaderForId(rule.styleSheetId) : null;
     if (ruleLocation && rule.styleSheetId && header && header.resourceURL())
         return WebInspector.StylePropertiesSection._linkifyRuleLocation(cssModel, linkifier, rule.styleSheetId, ruleLocation);
 
-    if (rule.isUserAgent)
+    if (rule.isUserAgent())
         return createTextNode(WebInspector.UIString("user agent stylesheet"));
-    if (rule.isInjected)
+    if (rule.isInjected())
         return createTextNode(WebInspector.UIString("injected stylesheet"));
-    if (rule.isViaInspector)
+    if (rule.isViaInspector())
         return createTextNode(WebInspector.UIString("via inspector"));
 
     if (header && header.ownerNode) {
         var link = WebInspector.DOMPresentationUtils.linkifyDeferredNodeReference(header.ownerNode);
         link.textContent = "<style>…</style>";
         return link;
     }
 
     return createTextNode("");
 }
@@ skipping 1456 matching lines @@
 
     /**
      * @override
      * @return {?WebInspector.ToolbarItem}
      */
     item: function()
     {
         return this._button;
     }
 }