WebUI: Fix more violations of no-extra-semi lint rule.

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="../../../../ui/webui/resources/js/cr/ui/focus_row.js">
 // <include src="../../../../ui/webui/resources/js/cr/ui/focus_grid.js">
 // <include src="../uber/uber_utils.js">
 // <include src="drag_and_drop_handler.js">
 // <include src="extension_code.js">
 // <include src="extension_commands_overlay.js">
@@ skipping 440 matching lines @@
     var style = document.createElement('style');
     style.type = 'text/css';
     style.textContent =
         '.enable-checkbox-text {' +
         '  min-width: ' + (pxWidth - trashWidth) + 'px;' +
         '}' +
         '#dev-toggle span {' +
         '  min-width: ' + pxWidth + 'px;' +
         '}';
     document.querySelector('head').appendChild(style);
-  };
+  }
 
   // Export
   return {
     ExtensionSettings: ExtensionSettings
   };
 });
 
 window.addEventListener('load', function(e) {
   extensions.ExtensionSettings.getInstance().initialize();
 });