Remove pp_ifdef from resource files in chrome/browser and chrome/renderer.

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>
 <include src="extension_error_overlay.js"></include>
 
-<if expr="pp_ifdef('chromeos')">
+<if expr="chromeos">
 <include src="chromeos/kiosk_apps.js"></include>
 </if>
 
 // Used for observing function of the backend datasource for this page by
 // tests.
 var webuiResponded = false;
 
 cr.define('extensions', function() {
   var ExtensionsList = options.ExtensionsList;
 
@@ skipping 376 matching lines @@
 
   // Export
   return {
     ExtensionSettings: ExtensionSettings
   };
 });
 
 window.addEventListener('load', function(e) {
   extensions.ExtensionSettings.getInstance().initialize();
 });