Add "open as window" menu item to NTP app menu.

chrome/app/generated_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- This file contains definitions of resources that will be translated for
 each locale. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/generated_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>
@@ skipping 7414 matching lines @@
         Options
       </message>
       <message name="IDS_APP_CONTEXT_MENU_OPEN_PINNED"
                desc="Text for the button that opens the app in a pinned tab.">
         Open as pinned tab
       </message>
       <message name="IDS_APP_CONTEXT_MENU_OPEN_REGULAR"
                desc="Text for the button that opens the app in a regular tab.">
         Open as regular tab
       </message>
+      <message name="IDS_APP_CONTEXT_MENU_OPEN_WINDOW"
+               desc="Text for the button that opens the app in an app window.">
+        Open as window
+      </message>
       <message name="IDS_APP_CONTEXT_MENU_OPEN_FULLSCREEN"
                desc="Text for the button that opens the app full screen.">
         Open full screen
       </message>
 
       <!-- Offline page  -->
       <if expr="pp_ifdef('chromeos')">
         <message name="IDS_OFFLINE_LOAD_HEADLINE" desc="Offline Page HTML headline">
           Your device is offline.
         </message>
@@ skipping 3637 matching lines @@
 
     </messages>
 
     <structures fallback_to_english="true">
       <structure name="IDD_CHROME_FRAME_FIND_DIALOG" file="cf_resources.rc" type="dialog" >
       </structure>
     </structures>
 
   </release>
 </grit>