Change var blah_blah -> blahBlah.

chrome/browser/resources/extensions/extensions.js

 // Copyright (c) 2012 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.
 
 <include src="../uber/uber_utils.js"></include>
 <include src="extension_commands_overlay.js"></include>
 <include src="extension_focus_manager.js"></include>
 <include src="extension_list.js"></include>
 <include src="pack_extension_overlay.js"></include>
 
 // Used for observing function of the backend datasource for this page by
 // tests.
-var webui_responded_ = false;
+var webuiResponded = false;
 
 cr.define('extensions', function() {
   var ExtensionsList = options.ExtensionsList;
 
   // Implements the DragWrapper handler interface.
   var dragWrapperHandler = {
     // @inheritdoc
     shouldAcceptDrag: function(e) {
       // We can't access filenames during the 'dragenter' event, so we have to
       // wait until 'drop' to decide whether to do something with the file or
@@ skipping 203 matching lines @@
   ExtensionSettings.returnExtensionsData = function(extensionsData) {
     // We can get called many times in short order, thus we need to
     // be careful to remove the 'finished loading' timeout.
     if (this.loadingTimeout_)
       window.clearTimeout(this.loadingTimeout_);
     document.documentElement.classList.add('loading');
     this.loadingTimeout_ = window.setTimeout(function() {
       document.documentElement.classList.remove('loading');
     }, 0);
 
-    webui_responded_ = true;
+    webuiResponded = true;
 
     if (extensionsData.extensions.length > 0) {
       // Enforce order specified in the data or (if equal) then sort by
       // extension name (case-insensitive).
       extensionsData.extensions.sort(function(a, b) {
         if (a.order == b.order) {
           a = a.name.toLowerCase();
           b = b.name.toLowerCase();
           return a < b ? -1 : (a > b ? 1 : 0);
         } else {
@@ skipping 125 matching lines @@
   return {
     ExtensionSettings: ExtensionSettings
   };
 });
 
 var ExtensionSettings = extensions.ExtensionSettings;
 
 window.addEventListener('load', function(e) {
   ExtensionSettings.getInstance().initialize();
 });