Adds functionality to pack an extension / app from the app.

chrome/browser/resources/apps_debugger/css/items.css

 /* Copyright (c) 2012 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. */
 
 body,
 html {
   overflow-x: visible;
   overflow-y: visible;
 }
 
@@ skipping 108 matching lines @@
 .install-warnings a {
   -webkit-margin-start: 0;
 }
 
 #font-measuring-div {
   /* Remove from the flow and hide. */
   position: absolute;
   visibility: hidden;
 }
 
+/* Overlays */
+
+#overlay {
+  z-index: 5;
+}
+
+#overlay .page:not(.showing) {

[Dan Beam, 2013/02/11 23:44:24]

aren't the overlays already being marked with [hidden], which makes them
display: none;?

[Gaurav, 2013/02/12 19:33:17]

There are two types of overlay which are both hidden initially. Their visibility
is triggered by setting "showing" in items.js

On 2013/02/11 23:44:24, Dan Beam wrote:

+  display: none;
+}
+
 /* Trash */
 
 #extension-settings .trash {
   -webkit-transition: opacity 200ms;
   height: 22px;
   opacity: 0.8;
   position: absolute;
   right: 0;
   top: 3px;
   vertical-align: middle;
@@ skipping 17 matching lines @@
 }
 
 a {
   color: rgb(17, 85, 204);
   text-decoration: underline;
 }
 
 a:active {
   color: rgb(5, 37, 119);
 }