Run shim's watchForTag on document.DOMContentLoaded

chrome/renderer/resources/extensions/app_window_custom_bindings.js

 // Copyright (c) 2012 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.
 
 // Custom binding for the app_window API.
 
 var appWindowNatives = requireNative('app_window_natives');
+var renderViewObserverNatives = requireNative('renderViewObserverNatives');
 var Binding = require('binding').Binding;
 var Event = require('event_bindings').Event;
 var forEach = require('utils').forEach;
 var sendRequest = require('sendRequest').sendRequest;
 
 var appWindowData = null;
 var currentAppWindow = null;
 
 var appWindow = Binding.create('app.window');
 appWindow.registerCustomHook(function(bindingsAPI) {
@@ skipping 31 matching lines @@
     view.chrome.app.window.initializeAppWindow(windowParams);
 
     var callback = request.callback;
     if (callback) {
       delete request.callback;
       if (!view) {
         callback(undefined);
         return;
       }
 
-      var willCallback = appWindowNatives.OnContextReady(windowParams.viewId,
-                                                         function(success) {
-        if (success) {
-          callback(view.chrome.app.window.current());
-        } else {
-          callback(undefined);
-        }
-      });
+      var willCallback =
+            renderViewObserverNatives.OnDocumentCreated(windowParams.viewId,
+                                                        function(success) {
+              if (success) {
+                callback(view.chrome.app.window.current());
+              } else {
+                callback(undefined);
+              }
+            });
       if (!willCallback) {
         callback(undefined);
       }
     }
   });
 
   apiFunctions.setHandleRequest('current', function() {
     if (!currentAppWindow) {
       console.error('chrome.app.window.current() is null -- window not ' +
                     'created with chrome.app.window.create()');
@@ skipping 85 matching lines @@
 
 function onAppWindowClosed() {
   if (!currentAppWindow)
     return;
   currentAppWindow.onClosed.dispatch();
 }
 
 exports.binding = appWindow.generate();
 exports.onAppWindowClosed = onAppWindowClosed;
 exports.updateAppWindowProperties = updateAppWindowProperties;