DevTools: Load document (html) content from disk cache in page agent enabling.

Source/devtools/front_end/elements/ElementsPanel.js

Index: Source/devtools/front_end/elements/ElementsPanel.js
diff --git a/Source/devtools/front_end/elements/ElementsPanel.js b/Source/devtools/front_end/elements/ElementsPanel.js
index 929ebb38e0f240b2482c399af8fc226da946d2d6..eef78ccf53634690d1c3c3b480132442b7a7317c 100644
--- a/Source/devtools/front_end/elements/ElementsPanel.js
+++ b/Source/devtools/front_end/elements/ElementsPanel.js
@@ -135,7 +135,6 @@ WebInspector.ElementsPanel.prototype = {
         this._targetToTreeOutline.put(target, treeOutline);
 
         target.domModel.addEventListener(WebInspector.DOMModel.Events.DocumentUpdated, this._documentUpdatedEvent, this);
-        target.cssModel.addEventListener(WebInspector.CSSStyleModel.Events.ModelWasEnabled, this._updateSidebars, this);
 
         // Perform attach if necessary.
         if (this.isShowing())
@@ -153,7 +152,6 @@ WebInspector.ElementsPanel.prototype = {
         treeOutline.element.remove();
 
         target.domModel.removeEventListener(WebInspector.DOMModel.Events.DocumentUpdated, this._documentUpdatedEvent, this);
-        target.cssModel.removeEventListener(WebInspector.CSSStyleModel.Events.ModelWasEnabled, this._updateSidebars, this);
     },
 
     /**
@@ -1068,22 +1066,10 @@ WebInspector.ElementsPanel.prototype = {
     },
 
     /**
-     * @return {boolean}
-     */
-    _cssModelEnabledForSelectedNode: function()
-    {
-        if (!this.selectedDOMNode())
-            return true;
-        return this.selectedDOMNode().target().cssModel.isEnabled();
-    },
-
-    /**
      * @param {boolean=} forceUpdate
      */
     updateStyles: function(forceUpdate)
     {
-        if (!this._cssModelEnabledForSelectedNode())
-            return;
         var stylesSidebarPane = this.sidebarPanes.styles;
         var computedStylePane = this.sidebarPanes.computedStyle;
         if ((!stylesSidebarPane.isShowing() && !computedStylePane.isShowing()) || !stylesSidebarPane.needsUpdate)
@@ -1095,8 +1081,6 @@ WebInspector.ElementsPanel.prototype = {
 
     updateMetrics: function()
     {
-        if (!this._cssModelEnabledForSelectedNode())
-            return;
         var metricsSidebarPane = this.sidebarPanes.metrics;
         if (!metricsSidebarPane.isShowing() || !metricsSidebarPane.needsUpdate)
             return;
@@ -1107,8 +1091,6 @@ WebInspector.ElementsPanel.prototype = {
 
     updatePlatformFonts: function()
     {
-        if (!this._cssModelEnabledForSelectedNode())
-            return;
         var platformFontsSidebar = this.sidebarPanes.platformFonts;
         if (!platformFontsSidebar.isShowing() || !platformFontsSidebar.needsUpdate)
             return;