Add custom action support

third_party/closure_compiler/externs/automation.js

Index: third_party/closure_compiler/externs/automation.js
diff --git a/third_party/closure_compiler/externs/automation.js b/third_party/closure_compiler/externs/automation.js
index 128d92feb3eaf68d198f9a6ba9be246ed995741b..469fe4d7c363c8c3e3f22d637f92f02d5e7e18ff 100644
--- a/third_party/closure_compiler/externs/automation.js
+++ b/third_party/closure_compiler/externs/automation.js
@@ -3,7 +3,7 @@
 // found in the LICENSE file.
 
 // This file was generated by:
-//   tools/json_schema_compiler/compiler.py.
+//   ./tools/json_schema_compiler/compiler.py.
 // NOTE: The format of types has changed. 'FooType' is now
 //   'chrome.automation.FooType'.
 // Please run the closure compiler before committing changes.
@@ -111,6 +111,8 @@ chrome.automation.RoleType = {
   DIALOG: 'dialog',
   DIRECTORY: 'directory',
   DISCLOSURE_TRIANGLE: 'disclosureTriangle',
+  // TODO(yawano): Remove div from extern file. This role no longer exists.
+  DIV: 'div',
   DOCUMENT: 'document',
   EMBEDDED_OBJECT: 'embeddedObject',
   FEED: 'feed',
@@ -366,6 +368,15 @@ chrome.automation.TreeChangeObserverFilter = {
   ALL_TREE_CHANGES: 'allTreeChanges',
 };
 
+/**
+ * @typedef {{
+ *   id: number,
+ *   description: string
+ * }}
+ * @see https://developer.chrome.com/extensions/automation#type-CustomAction
+ */
+chrome.automation.CustomAction;
+
 /**
  * @constructor
  * @private
@@ -531,6 +542,13 @@ chrome.automation.AutomationNode.prototype.activeDescendant;
  */
 chrome.automation.AutomationNode.prototype.inPageLinkTarget;
 
+/**
+ * An array of custom actions.
+ * @type {(!Array<!chrome.automation.CustomAction>|undefined)}
+ * @see https://developer.chrome.com/extensions/automation#type-customActions
+ */
+chrome.automation.AutomationNode.prototype.customActions;
+
 /**
  * The URL that this link will navigate to.
  * @type {(string|undefined)}
@@ -1048,6 +1066,13 @@ chrome.automation.AutomationNode.prototype.hitTest = function(x, y, eventToFire)
  */
 chrome.automation.AutomationNode.prototype.makeVisible = function() {};
 
+/**
+ * Performs custom action.
+ * @param {number} customActionId
+ * @see https://developer.chrome.com/extensions/automation#method-performCustomAction
+ */
+chrome.automation.AutomationNode.prototype.performCustomAction = function(customActionId) {};
+
 /**
  * Sets selection within a text field.
  * @param {number} startIndex