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 417 matching lines @@
 
     if (opt_focus) {
       // TODO(dtseng): Figure out what it means to focus a range.
       var actionNode = range.start.node;
       if (actionNode.role == RoleType.inlineTextBox)
         actionNode = actionNode.parent;
 
       // Iframes, when focused, causes the child webArea to fire focus event.
       // This can result in getting stuck when navigating backward.
       if (actionNode.role != RoleType.iframe && !actionNode.state.focused &&
-          !AutomationPredicate.structuralContainer(actionNode))
-        actionNode.focus();
+          !AutomationPredicate.structuralContainer(actionNode)) {
+        if (actionNode.state.focusable) {
+          actionNode.focus();
+        } else {
+          actionNode.setSequentialFocusNavigationStartingPoint();
+        }
+      }
     }
     var prevRange = this.currentRange_;
     this.setCurrentRange(range);
 
     var o = new Output();
     var selectedRange;
     if (this.pageSel_ &&
         this.pageSel_.isValid() &&
         range.isValid()) {
       // Compute the direction of the endpoints of each range.
@@ skipping 319 matching lines @@
   return new RegExp('^(' + globs.map(function(glob) {
     return glob.replace(/[.+^$(){}|[\]\\]/g, '\\$&')
         .replace(/\*/g, '.*')
         .replace(/\?/g, '.');
   }).join('|') + ')$');
 };
 
 new Background();
 
 });  // goog.scope