Use setSequentialFocusNavigationStartingPoint in ChromeVox

chrome/browser/resources/chromeos/chromevox/cvox2/background/background_test.extjs

 // 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.
 
 // Include test fixture.
 GEN_INCLUDE(['../../testing/chromevox_next_e2e_test_base.js',
              '../../testing/assert_additions.js']);
 
 GEN_INCLUDE(['../../testing/mock_feedback.js']);
 
@@ skipping 555 matching lines @@
     bk.setCurrentRange(cursors.Range.fromNode(fakeWebRoot));
     assertEquals('next_compat', bk.mode);
 
     // And, back to force next.
     fakeWebRoot.docUrl = 'http://google.com/';
     bk.setCurrentRange(cursors.Range.fromNode(fakeWebRoot));
     assertEquals('force_next', bk.mode);
   }.bind(this));
 });
 
-TEST_F('BackgroundTest', 'FocusIframe', function() {
+TEST_F('BackgroundTest', 'ShouldNotFocusIframe', function() {
   this.runWithLoadedTree(  function() {/*!
     <iframe tabindex=0 src="data:text/html,<p>Inside</p>"></iframe>
     <button>outside</button>
   */}, function(root) {
     var iframe = root.find({role: RoleType.iframe});
     var button = root.find({role: RoleType.button});
 
     assertEquals('iframe', iframe.role);
     assertEquals('button', button.role);
 
     var didFocus = false;
-    iframe.focus = function() {
+    iframe.addEventListener('focus', function() {
       didFocus = true;
-    };
+    });
     var b = ChromeVoxState.instance;
     b.currentRange_ = cursors.Range.fromNode(button);
     doCmd('previousElement');
     assertFalse(didFocus);
   }.bind(this));
 });
 
+TEST_F('BackgroundTest', 'ShouldFocusLink', function() {
+  this.runWithLoadedTree(  function() {/*!
+    <div><a href="#">mylink</a></div>
+    <button>after</button>
+  */}, function(root) {
+    var link = root.find({role: RoleType.link});
+    var button = root.find({role: RoleType.button});
+
+    assertEquals('link', link.role);
+    assertEquals('button', button.role);
+
+    var didFocus = false;
+    link.addEventListener('focus', this.newCallback(function() {
+      // Success
+    }));
+    var b = ChromeVoxState.instance;
+    b.currentRange_ = cursors.Range.fromNode(button);
+    doCmd('previousElement');
+  });
+});
+
 TEST_F('BackgroundTest', 'NoisySlider', function() {
   var mockFeedback = this.createMockFeedback();
   this.runWithLoadedTree(  function() {/*!
     <button id="go">go</button>
     <div id="slider" tabindex=0 role="slider"></div>
     <script>
       function update() {
         var s = document.getElementById('slider');
         s.setAttribute('aria-valuetext', 'noisy');
         setTimeout(update, 500);
@@ skipping 561 matching lines @@
     <input type="text"></input>
   */}, function(root) {
     this.listenOnce(root, 'focus', function(e) {
       var focus = ChromeVoxState.instance.currentRange.start.node;
       assertEquals(RoleType.textField, focus.role);
       assertTrue(focus.state.focused);
     });
     doCmd('nextEditText')();
   });
 });