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..e61b96ef74ec7be90d2f3e313441f87d33c09c5b 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.
  */
@@ -696,7 +703,6 @@ var stringAttributes = [
 
 var boolAttributes = [
     'ariaReadonly',
-    'buttonMixed',
     'containerLiveAtomic',
     'containerLiveBusy',
     'liveAtomic',