Added separate tabs for apps / extensions in dev_tools app.

chrome/browser/resources/apps_debugger/js/items.js

Index: chrome/browser/resources/apps_debugger/js/items.js
diff --git a/chrome/browser/resources/apps_debugger/js/items.js b/chrome/browser/resources/apps_debugger/js/items.js
index e92538abe4b87fd9cf4eec71be0a31a7f6721f2f..55e57ecaa821933b1f43c18f4aed12f30912dc31 100644
--- a/chrome/browser/resources/apps_debugger/js/items.js
+++ b/chrome/browser/resources/apps_debugger/js/items.js
@@ -19,6 +19,10 @@ cr.define('apps_dev_tool', function() {
      * Perform initial setup.
      */
     initialize: function() {
+

[Dan Beam, 2013/03/20 19:05:30]

nit: no \n

[Gaurav, 2013/03/29 21:14:26]

Done.

+      // Initialize the tabs.

[Dan Beam, 2013/03/20 19:05:30]

^ considering this is right below `initialize`, this comment either a) isn't
necessary, or b) should probably say something more along the lines of "Decorate
the tab box", but even that is pretty self-evident

[Gaurav, 2013/03/29 21:14:26]

Done.

+      cr.ui.decorate('tabbox', cr.ui.TabBox);

[Dan Beam, 2013/03/20 19:05:30]

nit: tab-box, IMO

[Gaurav, 2013/03/29 21:14:26]

This only seem to work with "tabbox". 

+
       // Set up the three buttons (load unpacked, pack and update).
       $('load-unpacked').addEventListener('click',
           this.handleLoadUnpackedItem_.bind(this));