AX checked state changes

chrome/renderer/resources/extensions/automation/automation_node.js

Index: chrome/renderer/resources/extensions/automation/automation_node.js
diff --git a/chrome/renderer/resources/extensions/automation/automation_node.js b/chrome/renderer/resources/extensions/automation/automation_node.js
index 15b722570a53cce1a08e750c559672d4226247d3..d9e72292ade7a76f146bd1cf982a18ea09ad73d2 100644
--- a/chrome/renderer/resources/extensions/automation/automation_node.js
+++ b/chrome/renderer/resources/extensions/automation/automation_node.js
@@ -135,6 +135,13 @@ var GetState = requireNative('automationInternal').GetState;
 /**
  * @param {number} axTreeID The id of the accessibility tree.
  * @param {number} nodeID The id of a node.
+ * @return {string} The checked state, as undefined, "true", "false" or "mixed".
+ */
+var GetChecked = requireNative('automationInternal').GetChecked;
+
+/**
+ * @param {number} axTreeID The id of the accessibility tree.
+ * @param {number} nodeID The id of a node.
  * @return {string} The role of the node, or undefined if the tree or
  *     node wasn't found.
  */
@@ -283,6 +290,10 @@ AutomationNodeImpl.prototype = {
     return GetRole(this.treeID, this.id);
   },
 
+  get checked() {
+    return GetChecked(this.treeID, this.id);
+  },
+
   get location() {
     return GetLocation(this.treeID, this.id);
   },
@@ -696,7 +707,6 @@ var stringAttributes = [
 
 var boolAttributes = [
     'ariaReadonly',
-    'buttonMixed',
     'containerLiveAtomic',
     'containerLiveBusy',
     'liveAtomic',
@@ -1102,6 +1112,7 @@ utils.expose(AutomationNode, AutomationNodeImpl, {
       'nextSibling',
       'isRootNode',
       'role',
+      'checked',
       'state',
       'location',
       'indexInParent',