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

chrome/browser/resources/apps_debugger/css/pack_item_overlay.css

Index: chrome/browser/resources/apps_debugger/css/pack_item_overlay.css
diff --git a/chrome/browser/resources/extensions/pack_extension_overlay.css b/chrome/browser/resources/apps_debugger/css/pack_item_overlay.css
similarity index 73%
copy from chrome/browser/resources/extensions/pack_extension_overlay.css
copy to chrome/browser/resources/apps_debugger/css/pack_item_overlay.css
index 684ae33820da6e0106564c6923f2d98740dd1223..ab609b8c6697e81b3c0071584d1de4f3028f5544 100644
--- a/chrome/browser/resources/extensions/pack_extension_overlay.css
+++ b/chrome/browser/resources/apps_debugger/css/pack_item_overlay.css
@@ -2,21 +2,20 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
-.pack-extension-heading {
+.pack-item-heading {
   padding-bottom: 5px;
   width: 520px;
 }
 
-.pack-extension-text-boxes {
+.pack-item-text-boxes {
   text-align: right;
 }
 
-.pack-extension-text-area {
+.pack-item-text-area {
   width: 260px;
 }
 
 <if expr="pp_ifdef('toolkit_views')">
-/* TODO(estade): apply this everywhere. */
 .button-strip {
   -webkit-box-direction: reverse;
 }