Implement actions for Automation API.

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// TODO(dtseng): Figure out if there's any other way to get access to
+// AutomationInternal.
+var automationInternal =
+    require('binding').Binding.create('automationInternal').generate();
 var utils = require('utils');
 
 /**
  * A single node in the Automation tree.
  * @param {AutomationTree} owner The owning tree.
  * @constructor
  */
 var AutomationNodeImpl = function(owner) {
   this.owner = owner;
   this.child_ids = [];
@@ skipping 30 matching lines @@
       return parent.children()[this.index_in_parent - 1];
     return undefined;
   },
 
   nextSibling: function() {
     var parent = this.parent();
     if (parent && this.index_in_parent < parent.children().length)
       return parent.children()[this.index_in_parent + 1];
     return undefined;
   },
+
+  doDefault: function() {
+    AutomationInternal.performAction(
+        'doDefault', this.owner.process_id, this.id)
+    },
+
+  focus: function() {
+    AutomationInternal.performAction(
+        'focus', this.owner.process_id, this.id)
+  },
+
+  makeVisible: function() {
+    AutomationInternal.performAction(
+        'makeVisible', this.owner.process_id, this.id)
+  },
+
+  setSelection: function(startIndex, endIndex) {
+    AutomationInternal.performAction(
+        'setSelection', this.owner.process_id, this.id, [startIndex, endIndex]);
+  },
 };
 
-
 var AutomationNode = utils.expose('AutomationNode',
                                   AutomationNodeImpl,
                                   ['parent',
                                    'firstChild',
                                    'lastChild',
                                    'children',
                                    'previousSibling',
-                                   'nextSibling']);
+                                   'nextSibling',
+                                   'doDefault',
+                                   'focus',
+                                   'makeVisible',
+                                   'setSelection']);
 exports.AutomationNode = AutomationNode;