[File Manager] Better Google Drive promo layout in Open/Save dialogs

chrome/browser/resources/file_manager/js/mock_chrome.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.
 
 function MockEventSource() {
   this.listeners_ = [];
 }
 
 /**
  * Add a listener. There is no remove.
@@ skipping 219 matching lines @@
     chrome.fileBrowserPrivate.requestLocalFileSystem(function(filesystem) {
       var path =
           (type == 'gdata') ?
           '/gdata' :
           ('/archive/archive' + (++chrome.fileBrowserPrivate.archiveCount_));
       util.getOrCreateDirectory(filesystem.root, path, function() {
           chrome.fileBrowserPrivate.mountPoints_.push({
             mountPath: path,
             type: type
           });
-          chrome.fileBrowserPrivate.onMountCompleted.notify({
-            eventType: 'mount',
-            status: 'success',
-            mountType: type,
-            authToken: 'dummy',
-            mountPath: path,
-            sourceUrl: source
-          });
+          setTimeout(function() {
+            chrome.fileBrowserPrivate.onMountCompleted.notify({
+              eventType: 'mount',
+              status: 'success',
+              mountType: type,
+              authToken: 'dummy',
+              mountPath: path,
+              sourceUrl: source
+            });
+          }, 1000);
           console.log('Created a mock mount at ' + path);
         },
         util.flog('Error creating a mock mount at ' + path));
     });
   },
 
   removeMount: function(sourceUrl) {
     var mountPath = chrome.fileBrowserPrivate.fileUrlToLocalPath_(sourceUrl);
     for (var i = 0; i != chrome.fileBrowserPrivate.mountPoints_.length; i++) {
       if (mountPath == chrome.fileBrowserPrivate.mountPoints_[i].mountPath) {
@@ skipping 404 matching lines @@
 
   setWindowHeight: function(height) {
     this.popup_.style.height = height + 'px';
   },
 
   closeWindow: function() {
     this.popup_.parentNode.removeChild(this.popup_);
     this.popup_ = null;
   }
 };