Use setSequentialFocusNavigationStartingPoint in ChromeVox

chrome/browser/resources/chromeos/chromevox/cvox2/background/background.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.
 
 /**
  * @fileoverview The entry point for all ChromeVox2 related code for the
  * background page.
  */
 
 goog.provide('Background');
@@ skipping 752 matching lines @@
     // event.  This can result in getting stuck when navigating
     // backward.
     var isFocusable = function(node) {
       return node.role != RoleType.iframe &&
           node.state.focusable &&
           !node.state.focused &&
           !AutomationPredicate.structuralContainer(node);
     };
     if (isFocusable(start)) {
       start.focus();
-      return;
+    } else if (isFocusable(end)) {
+      end.focus();
+    } else {
+      start.setSequentialFocusNavigationStartingPoint();

[David Tseng, 2016/10/26 17:03:26]

Does this work on in line text boxes?

     }
-    if (isFocusable(end)) {
-      end.focus();
-      return;
-    }
-
-    // TODO(dmazzoni): Set sequential focus.
   }
 };
 
 /**
  * Converts a list of globs, as used in the extension manifest, to a regular
  * expression that matches if and only if any of the globs in the list matches.
  * @param {!Array<string>} globs
  * @return {!RegExp}
  * @private
  */
 Background.globsToRegExp_ = function(globs) {
   return new RegExp('^(' + globs.map(function(glob) {
     return glob.replace(/[.+^$(){}|[\]\\]/g, '\\$&')
         .replace(/\*/g, '.*')
         .replace(/\?/g, '.');
   }).join('|') + ')$');
 };
 
 new Background();
 
 });  // goog.scope