[DevTools] Extract part of DevTools into inspector app.

Source/devtools/front_end/main/Main.js

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2007 Matt Lilek (pewtermoose@gmail.com).
  * 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
@@ skipping 18 matching lines @@
  */
 
 /**
  * @constructor
  * @implements {InspectorAgent.Dispatcher}
  * @implements {WebInspector.Console.UIDelegate}
  * @suppressGlobalPropertiesCheck
  */
 WebInspector.Main = function()
 {
-    var boundListener = windowLoaded.bind(this);
-    WebInspector.console.setUIDelegate(this);
-    if (document.readyState === "complete") {
-        this._loaded();
+    if (!InspectorAppHost) {
+        console.error("Inspector should be embedded.");
         return;
     }
-
-    /**
-     * @suppressGlobalPropertiesCheck
-     * @this {WebInspector.Main}
-     */
-    function windowLoaded()
-    {
-        this._loaded();
-        window.removeEventListener("DOMContentLoaded", boundListener, false);
-    }
-    window.addEventListener("DOMContentLoaded", boundListener, false);
+    InspectorAppHost.beforeInspectorAppLoad();
+    WebInspector.console.setUIDelegate(this);
+    runOnWindowLoad(this._loaded.bind(this));
 }
 
 WebInspector.Main.prototype = {
     /**
      * @return {!Promise.<undefined>}
      */
     showConsole: function()
     {
         return WebInspector.Revealer.revealPromise(WebInspector.console);
     },
@@ skipping 193 matching lines @@
 
         // It is important to kick controller lifetime after apps are instantiated.
         WebInspector.dockController.initialize();
         console.timeStamp("Main._presentUI");
         WebInspector.app.presentUI(document);
 
         if (!WebInspector.isWorkerFrontend())
             WebInspector.inspectElementModeController = new WebInspector.InspectElementModeController();
         this._createGlobalStatusBarItems();
 
+        InspectorAppHost.afterInspectorAppLoad();
         InspectorFrontendHost.loadCompleted();
 
         // Give UI cycles to repaint, then proceed with creating connection.
         setTimeout(this._createConnection.bind(this), 0);
     },
 
     _createConnection: function()
     {
         console.timeStamp("Main._createConnection");
         InspectorBackend.loadFromJSONIfNeeded("../protocol.json");
@@ skipping 609 matching lines @@
     /**
      * @param {!WebInspector.Event} event
      */
     _inspectNode: function(event)
     {
         WebInspector.Revealer.reveal(/** @type {!WebInspector.DOMNode} */ (event.data));
     }
 }
 
 new WebInspector.Main();