Get rid of nested functions declarations that are not on top level (causes strict mode warnings)

lib/appSupport.js

Index: lib/appSupport.js
===================================================================
--- a/lib/appSupport.js
+++ b/lib/appSupport.js
@@ -479,17 +479,17 @@ switch (application)
       if (!parent || !(parent.compareDocumentPosition(browser) & Ci.nsIDOMNode.DOCUMENT_POSITION_CONTAINED_BY))
         parent = browser.parentNode;
 
       _addBottomBar(window, parent, element);
     };
 
     exports.removeBottomBar = _removeBottomBar;
 
-    function BrowserChangeListener(window, callback)
+    let BrowserChangeListener = function(window, callback)
     {
       this.window = window;
       this.callback = callback;
       this.onSelect = this.onSelect.bind(this);
       this.attach();
     };
     BrowserChangeListener.prototype = {
       window: null,
@@ -686,17 +686,17 @@ switch (application)
   case "fennec2":
   {
     exports.isKnownWindow = function fmn_isKnownWindow(/**Window*/ window) window.document.documentElement.id == "main-window";
 
     exports.getBrowser = function fmn_getBrowser(window) window.BrowserApp.selectedBrowser;
 
     exports.addTab = function fmn_addTab(window, url, event) window.BrowserApp.addTab(url, {selected: true});
 
-    function BrowserChangeListener(window, callback)
+    let BrowserChangeListener = function(window, callback)
     {
       this.window = window;
       this.callback = callback;
       this.onSelect = this.onSelect.bind(this);
       this.attach();
     };
     BrowserChangeListener.prototype = {
       window: null,
@@ -830,17 +830,17 @@ switch (application)
     };
 
     let {Filter} = require("filterClasses");
     let {Prefs} = require("prefs");
     let {Policy} = require("contentPolicy");
     let {UI} = require("ui");
     let {Utils} = require("utils");
 
-    function toggleWhitelist(window)
+    let toggleWhitelist = function(window)
     {
       if (!Prefs.enabled)
       {
         Prefs.enabled = true;
         return;
       }
 
       let location = exports.getCurrentLocation(window);
@@ -855,17 +855,17 @@ switch (application)
 
       if (!host)
         return;
 
       if (Policy.isWhitelisted(location.spec))
         UI.removeWhitelist(window);
       else
         UI.toggleFilter(Filter.fromText("@@||" + host + "^$document"));
-    }
+    };
 
     let menuItem = null;
     onShutdown.add(function()
     {
       let window = null;
       for (window in UI.applicationWindows)
         break;