Remove unused roles(EditableText, SplitGroup, GrowArea) from Chromium.

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.
 
 var AutomationEvent = require('automationEvent').AutomationEvent;
 var automationInternal =
     require('binding').Binding.create('automationInternal').generate();
 var IsInteractPermitted =
     requireNative('automationInternal').IsInteractPermitted;
 
@@ skipping 755 matching lines @@
         break;
       }
     }
 
     // If this is a link, set link attributes
     if (nodeData.role == 'link') {
       this.mixinAttributes_(nodeImpl, LinkMixinAttributes, nodeData);
     }
 
     // If this is an editable text area, set editable text attributes.
-    if (nodeData.role == schema.RoleType.editableText ||
-        nodeData.role == schema.RoleType.textField ||
+    if (nodeData.role == schema.RoleType.textField ||
         nodeData.role == schema.RoleType.textArea) {
       this.mixinAttributes_(nodeImpl, EditableTextMixinAttributes, nodeData);
     }
 
     // If this is a range type, set range attributes.
     if (nodeData.role == schema.RoleType.progressIndicator ||
         nodeData.role == schema.RoleType.scrollBar ||
         nodeData.role == schema.RoleType.slider ||
         nodeData.role == schema.RoleType.spinButton) {
       this.mixinAttributes_(nodeImpl, RangeMixinAttributes, nodeData);
@@ skipping 196 matching lines @@
                                                'attributes',
                                                'indexInParent',
                                                'root'] });
 
 var AutomationRootNode = utils.expose('AutomationRootNode',
                                       AutomationRootNodeImpl,
                                       { superclass: AutomationNode });
 
 exports.AutomationNode = AutomationNode;
 exports.AutomationRootNode = AutomationRootNode;