Run jshint over all JavaScript files

ports/gdb/extension/background.js

 /*
  * Copyright (c) 2014 The Native Client 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';
 
 // The background page of the debugger extension has a few purposes:
 // - Track and react to nacl process create / exit / suspend.
@@ skipping 274 matching lines @@
     }
   });
 
   // Drop the listener on disconnect.
   port.onDisconnect.addListener(function() {
     delete g_listeners[id];
   });
 
   // Announce the new module.
   notifyListeners('join');
-};
+}
 
 /**
  * Listen for internal connection events (from main.js).
  */
 chrome.runtime.onConnect.addListener(handleConnect);
 
 /**
  * Allow an external connection only for testing and install check.
  */
 chrome.runtime.onConnectExternal.addListener(function(port) {
   // Check the sender only when not in testing mode.
   if (navigator.userAgent.indexOf('ChromeTestAgent/') < 0) {
     // Reject if the sender is an extension (unsupported for now).
     // Allow urls (as we're only whitelisting the install page).
     if (port.sender.id !== undefined) {
       port.disconnect();
       return;
     }
   }
   handleConnect(port);
 });