Added prefs ui for enabling/disabling background mode on windows.

chrome/app/chromium_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This file contains definitions of strings that are distribution specific.
 These strings will not be translated and only english versions will
 be available for now. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/chromium_strings.h" type="rc_header">
       <emit emit_type='prepend'></emit>
@@ skipping 368 matching lines @@
       <message name="IDS_UNINSTALL_FAILED" desc="Error during uninstall if we can not find the installation directory from registry.">
         Chromium is not installed or it failed to find installation directory. Please download Chromium again.
       </message>
       <message name="IDS_UNINSTALL_COMPLETE" desc="Text displayed on dialog that is shown when uninstall is complete and no reboot is required.">
         Uninstallation complete.
       </message>
       <message name="IDS_INSTALL_DIR_IN_USE" desc="Error during install if Chromium version is missing from registry but the installation directory exists and can not be deleted.">
         Chromium installation directory seems to be in use. Please reboot your computer and try again.
       </message>
       <!-- Options Dialog -->
+      <message name="IDS_OPTIONS_ADVANCED_SECTION_TITLE_CHROME_APPS" desc="The title text in the options panel that provides options for installed web apps.">
+        Chromium Web Apps
+      </message>
       <message name="IDS_OPTIONS_DISABLE_SERVICES" desc="The text in the options panel that describes how we use web services to improve browsing experience.">
         Chromium may use web services to improve your browsing experience. You may optionally disable these services.
       </message>
       <message name="IDS_IMPORT_BOOKMARKS" desc="Explanatory text for the importing progress dialog when importing a bookmarks.html file from the bookmark manager">
         Chromium is now importing Favorites/Bookmarks.
       </message>
       <message name="IDS_OEM_MAIN_SHORTCUT_NAME" desc="Name of the desktop shortcut to start the application for OEM pre-installations.">
         Internet Browser
       </message>
       <message name="IDS_SHORTCUT_TOOLTIP" desc="Text for the hover-on tooltip for the Chromium shortcuts.">
@@ skipping 67 matching lines @@
         <message name="IDS_PROFILEIMPORTER_APP_NAME" desc="The profile importer application's name.  Should contain the Chrome application name (IDS_PRODUCT_NAME). Example: Google Chrome Profile Importer.">
           Chromium Profile Importer
         </message>
         <message name="IDS_SHORT_PROFILEIMPORTER_APP_NAME" desc="The profile importer application's short name, used for the Mac's application menu, activity monitor, etc. Example: Chrome Profile Importer, not Google Chrome Profile Importer.">
           Chromium Profile Importer
         </message>
       </if>
     </messages>
   </release>
 </grit>