Revert 169371 "DevTools: defer styles delta calculation to until..."

trunk/Source/devtools/front_end/CSSStyleModel.js

Index: trunk/Source/devtools/front_end/CSSStyleModel.js
===================================================================
--- trunk/Source/devtools/front_end/CSSStyleModel.js	(revision 169387)
+++ trunk/Source/devtools/front_end/CSSStyleModel.js	(working copy)
@@ -169,23 +169,7 @@
      */
     allStyleSheets: function()
     {
-        var values = Object.values(this._styleSheetIdToHeader);
-        /**
-         * @param {!WebInspector.CSSStyleSheetHeader} a
-         * @param {!WebInspector.CSSStyleSheetHeader} b
-         * @return {number}
-         */
-        function styleSheetComparator(a, b)
-        {
-            if (a.sourceURL < b.sourceURL)
-                return -1;
-            else if (a.sourceURL > b.sourceURL)
-                return 1;
-            return a.startLine - b.startLine || a.startColumn - b.startColumn;
-        }
-        values.sort(styleSheetComparator);
-
-        return values;
+        return Object.values(this._styleSheetIdToHeader);
     },
 
     /**
@@ -361,6 +345,7 @@
 
     mediaQueryResultChanged: function()
     {
+        this._styleLoader.reset();
         this.dispatchEventToListeners(WebInspector.CSSStyleModel.Events.MediaQueryResultChanged);
     },
 
@@ -398,6 +383,7 @@
      */
     _fireStyleSheetChanged: function(styleSheetId)
     {
+        this._styleLoader.reset();
         if (!this._pendingCommandsMajorState.length)
             return;
 
@@ -427,6 +413,7 @@
             frameIdToStyleSheetIds[styleSheetHeader.frameId] = styleSheetIds;
         }
         styleSheetIds.push(styleSheetHeader.id);
+        this._styleLoader.reset();
         this.dispatchEventToListeners(WebInspector.CSSStyleModel.Events.StyleSheetAdded, styleSheetHeader);
     },
 
@@ -446,6 +433,7 @@
             if (!Object.keys(this._styleSheetIdsForURL[url]).length)
                 delete this._styleSheetIdsForURL[url];
         }
+        this._styleLoader.reset();
         this.dispatchEventToListeners(WebInspector.CSSStyleModel.Events.StyleSheetRemoved, header);
     },
 
@@ -1535,6 +1523,16 @@
 }
 
 WebInspector.CSSStyleModel.ComputedStyleLoader.prototype = {
+    reset: function()
+    {
+        for (var nodeId in this._nodeIdToCallbackData) {
+            var callbacks = this._nodeIdToCallbackData[nodeId];
+            for (var i = 0; i < callbacks.length; ++i)
+                callbacks[i](null);
+        }
+        this._nodeIdToCallbackData = {};
+    },
+
     /**
      * @param {!DOMAgent.NodeId} nodeId
      * @param {function(?WebInspector.CSSStyleDeclaration)} userCallback