Use setSequentialFocusNavigationStartingPoint in ChromeVox

chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
index da65208f2ba68c0b2d373f8c8b50f83dc116c6db..1e2a3426cbf589ca381e87d08cd04d90eda51eb9 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/background.js
@@ -435,8 +435,13 @@ Background.prototype = {
       // 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);