Convert snakecase enum names to camelcase when stringified.

chrome/renderer/resources/extensions/automation/automation_tree.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 Event = require('event_bindings').Event;
 var AutomationNode = require('automationNode').AutomationNode;
 var utils = require('utils');
 
 // Maps an attribute to its default value in an invalidated node.
 // These attributes are taken directly from the Automation idl.
@@ skipping 118 matching lines @@
       }
 
       for (var k = 0, oldId; oldId = oldChildIDs[k]; k++) {
         // However, we must invalidate all old child ids that are no longer
         // children.
         if (!newChildIDsHash[oldId]) {
           this.invalidate(this.get(oldId));
         }
       }
 
-      if (nodeData.role == 'root_web_area' || nodeData.role == 'desktop') {
+      if (nodeData.role == 'rootWebArea' || nodeData.role == 'desktop') {
         this.root = node;
         didUpdateRoot = true;
       }
       for (var key in AutomationAttributeDefaults) {
         if (key in nodeData)
           privates(node).impl[key] = nodeData[key];
         else
           privates(node).impl[key] = AutomationAttributeDefaults[key];
       }
       for (var attributeTypeIndex = 0;
@@ skipping 28 matching lines @@
     }
     return toStringInternal(this.root, 0);
   }
 };
 
 exports.AutomationTree = utils.expose('AutomationTree',
                                       AutomationTreeImpl,
                                       { functions: ['addEventListener',
                                                     'removeEventListener'],
                                         readonly: ['root'] });