Revert of [DevTools] Inject element into toolbox window, do not load modules there.

Source/devtools/front_end/main/AdvancedApp.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @constructor
  * @extends {WebInspector.App}
  * @implements {WebInspector.ToolboxDelegate}
  */
 WebInspector.AdvancedApp = function()
@@ skipping 70 matching lines @@
             return;
 
         if (this._toolboxWindow)
             return;
 
         var url = window.location.href.replace("devtools.html", "toolbox.html");
         this._toolboxWindow = window.open(url, undefined);
     },
 
     /**
-     * @param {!Element} rootElement
-     * @override
+     * @param {!WebInspector.ResponsiveDesignView} responsiveDesignView
+     * @param {!WebInspector.InspectedPagePlaceholder} placeholder
      */
-    toolboxLoaded: function(rootElement)
+    toolboxLoaded: function(responsiveDesignView, placeholder)
     {
-        var inspectedPagePlaceholder = new WebInspector.InspectedPagePlaceholder();
-        inspectedPagePlaceholder.addEventListener(WebInspector.InspectedPagePlaceholder.Events.Update, this._onSetInspectedPageBounds.bind(this, true));
-        this._toolboxResponsiveDesignView = new WebInspector.ResponsiveDesignView(inspectedPagePlaceholder);
-        this._toolboxResponsiveDesignView.show(rootElement);
+        this._toolboxResponsiveDesignView = responsiveDesignView;
+        placeholder.addEventListener(WebInspector.InspectedPagePlaceholder.Events.Update, this._onSetInspectedPageBounds.bind(this, true));
         this._updatePageResizer();
     },
 
-    /**
-     * @return {!InspectorFrontendHostAPI}
-     */
-    inspectorFrontendHost: function()
-    {
-        return window.InspectorFrontendHost;
-    },
-
     _updatePageResizer: function()
     {
         if (this._isDocked())
             this._responsiveDesignView.updatePageResizer();
         else if (this._toolboxResponsiveDesignView)
             this._toolboxResponsiveDesignView.updatePageResizer();
     },
 
     /**
      * @param {!WebInspector.Event} event
@@ skipping 163 matching lines @@
     handleAction: function()
     {
         if (!WebInspector.overridesSupport.responsiveDesignAvailable())
             return false;
         if (!(WebInspector.app instanceof WebInspector.AdvancedApp))
             return false;
         WebInspector.app._toggleEmulationEnabled();
         return true;
     }
 }