[DevTools] Extract part of DevTools into inspector app.

Source/devtools/front_end/devtools_app/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");
+    WebInspector.setInspectedTabId = this._wrapInvocation.bind(this, "setInspectedTabId");
+    this._invokeOnWebInspectorOnceLoaded = [];
+
+    /**
+     * @type {?Window}
+     */
+    this._inspectorWindow = null;
+}
+
+WebInspector.DevToolsApp.prototype = {
+    /**
+     * @param {!Window} inspectorWindow
+     * @override
+     */
+    inspectorAppWindowLoaded: function(inspectorWindow)
+    {
+        this._inspectorWindow = inspectorWindow;
+        if (window.domAutomationController)
+            this._inspectorWindow.domAutomationController = window.domAutomationController;
+    },
+
+    /**
+     * @override
+     */
+    beforeInspectorAppLoad: function()
+    {
+        if (this._inspectorWindow.uiTests) {
+            // FIXME: move Tests to the host or teach browser counterpart about iframe.
+            window.uiTests = this._inspectorWindow.uiTests;
+        }
+    },
+
+    /**
+     * @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);
+    }
+}
+
+new WebInspector.DevToolsApp();