Expose html attributes in automation tree.

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 683bd9b5234a8d0ea2ee7fadba9b3637da168614..357f192146963438d3dcb199b4fe57ff25cb7bac 100644
--- a/chrome/renderer/resources/extensions/automation/automation_node.js
+++ b/chrome/renderer/resources/extensions/automation/automation_node.js
@@ -92,6 +92,13 @@ var GetChildIDAtIndex = requireNative('automationInternal').GetChildIDAtIndex;
 /**
  * @param {number} axTreeID The id of the accessibility tree.
  * @param {number} nodeID The id of a node.
+ * @return {?Object} An object mapping html attributes to values.
+ */
+var GetHtmlAttributes = requireNative('automationInternal').GetHtmlAttributes;
+
+/**
+ * @param {number} axTreeID The id of the accessibility tree.
+ * @param {number} nodeID The id of a node.
  * @return {?number} The index of this node in its parent, or undefined if
  *     the tree or node or node parent wasn't found.
  */
@@ -228,6 +235,10 @@ AutomationNodeImpl.prototype = {
     return this.rootImpl.get(parentID);
   },
 
+  get htmlAttributes() {
+    return GetHtmlAttributes(this.treeID, this.id) || {};
+  },
+
   get state() {
     return GetState(this.treeID, this.id) || {};
   },
@@ -1011,6 +1022,7 @@ utils.expose(AutomationNode, AutomationNodeImpl, {
       'location',
       'indexInParent',
       'root',
+      'htmlAttributes',
   ]),
 });