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

chrome/browser/resources/pdf/main.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.
 
 'use strict';
 
 /**
  * Global PDFViewer object, accessible for testing.
  * @type Object
  */
@@ skipping 31 matching lines @@
   /**
    * Entrypoint for starting the PDF viewer. This function obtains the browser
    * API for the PDF and constructs a PDFViewer object with it.
    */
   function main() {
     // Set up an event listener to catch scripting messages which are sent prior
     // to the PDFViewer being created.
     window.addEventListener('message', handleScriptingMessage, false);
 
     createBrowserApi().then(initViewer);
-  };
+  }
 
   main();
 })();