Update WebUI calls to use extensions namespace, update IDs in c/b/r/extensions

chrome/browser/resources/extensions/extension_commands_overlay.js

Index: chrome/browser/resources/extensions/extension_commands_overlay.js
diff --git a/chrome/browser/resources/extensions/extension_commands_overlay.js b/chrome/browser/resources/extensions/extension_commands_overlay.js
index d984be5a1600b1a9778da19f69d0c759f2431842..db02bff8e888152d756efbe8b2adb38583230e9f 100644
--- a/chrome/browser/resources/extensions/extension_commands_overlay.js
+++ b/chrome/browser/resources/extensions/extension_commands_overlay.js
@@ -31,7 +31,7 @@ cr.define('extensions', function() {
       cr.ui.overlay.globalInitialization();
       overlay.addEventListener('cancelOverlay', this.handleDismiss_.bind(this));
 
-      $('extensionCommandsDismiss').addEventListener('click',
+      $('extension-commands-dismiss').addEventListener('click',
           this.handleDismiss_.bind(this));
 
       // This will request the data to show on the page and will get a response
@@ -44,7 +44,7 @@ cr.define('extensions', function() {
      * @param {Event} e The click event.
      */
     handleDismiss_: function(e) {
-      ExtensionSettings.showOverlay(null);
+      extensions.ExtensionSettings.showOverlay(null);
     },
   };
 
@@ -75,6 +75,3 @@ cr.define('extensions', function() {
     ExtensionCommandsOverlay: ExtensionCommandsOverlay
   };
 });
-
-// Update the C++ call so this isn't necessary.
-var ExtensionCommandsOverlay = extensions.ExtensionCommandsOverlay;