[DevTools] Extract part of DevTools into inspector app.

Source/devtools/front_end/devtools_bootstrap/DevToolsApp.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
+ * @implements {InspectorAppHostAPI}
+ */
+WebInspector.DevToolsApp = function()
+{
+    window.InspectorAppHost = this;
+
+    // FIXME: These methods are invoked from the backend and should be removed
+    // once we migrate to the "pull" model for extensions retrieval.
+    WebInspector.addExtensions = this._wrapInvocation.bind(this, "addExtensions");

[pfeldman, 2014/11/10 15:48:36]

We should reverse the direction of these and make them pulled.

[dgozman, 2014/11/10 18:19:42]

We'll have to keep pushing model for old frontends for a while. I'll do in next
patch.

+    WebInspector.setInspectedTabId = this._wrapInvocation.bind(this, "setInspectedTabId");
+    this._invokeOnWebInspectorOnceLoaded = [];
+
+    /**
+     * @type {?Window}
+     */
+    this._inspectorWindow = null;
+    this._loadInspectorAppInIframe();
+}
+
+WebInspector.DevToolsApp.prototype = {
+    /**
+     * @param {!Window} window
+     * @override
+     */
+    inspectorAppWindowLoaded: function(window)
+    {
+        this._inspectorWindow = window;
+    },
+
+    /**
+     * @override
+     */
+    beforeInspectorAppLoad: function()
+    {
+    },
+
+    /**
+     * @override
+     */
+    afterInspectorAppLoad: function()
+    {
+        while (this._invokeOnWebInspectorOnceLoaded.length) {
+            var methodAndParams = this._invokeOnWebInspectorOnceLoaded.shift();
+            this._invokeOnWebInspector(methodAndParams[0], methodAndParams[1]);
+        }
+    },
+
+    /**
+     * @param {string} method
+     */
+    _wrapInvocation: function(method)
+    {
+        var params = Array.prototype.slice.call(arguments, 1);
+        if (this._inspectorWindow) {
+            this._invokeOnWebInspector(method, params);
+        } else {
+            this._invokeOnWebInspectorOnceLoaded.push([method, params]);
+        }
+    },
+
+    /**
+     * @param {string} method
+     * @param {!Array.<*>} params
+     */
+    _invokeOnWebInspector: function(method, params)
+    {
+        var webInspector = this._inspectorWindow["WebInspector"];
+        webInspector[method].apply(webInspector, params);
+    },
+
+    /**
+     * @suppressGlobalPropertiesCheck
+     */
+    _loadInspectorAppInIframe: function()
+    {
+        this._iframe = document.body.createChild("iframe", "inspector-app-iframe");
+        var url = window.location.href;
+        url = url.replace("devtools.html", "inspector.html");
+        this._iframe.setAttribute("src", url);
+    }
+}
+
+runOnWindowLoad(function() { new WebInspector.DevToolsApp(); });