[Mac] Bounce app shims when app windows request attention.

chrome/test/data/extensions/platform_apps/window_api_interactive/test.js

 // Copyright 2013 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.
 
 var callbackPass = chrome.test.callbackPass;
 
 function testWindowGetsFocus(win) {
   // If the window is already focused, we are done.
   if (win.contentWindow.document.hasFocus()) {
     chrome.test.assertTrue(win.contentWindow.document.hasFocus(),
@@ skipping 203 matching lines @@
           // We remove this and disable the entire test for Linux GTK when the
           // test will run on other platforms, see http://crbug.com/328829
           if (navigator.platform.indexOf('Linux') != 0)
             testWindowGetsFocus(win);
         });
       }));
     },
   ]);
 }
 
+function testDrawAttention() {
+  chrome.test.runTests([
+    function drawThenClearAttention() {
+      chrome.app.window.create('test.html', {}, callbackPass(function(win) {
+        win.drawAttention();
+        win.clearAttention();
+      }));
+    }
+  ]);
+}
+
 chrome.app.runtime.onLaunched.addListener(function() {
   chrome.test.sendMessage('Launched', function(reply) {
     window[reply]();
   });
 });