[Mac] Add a confirm to quit experiment to about:flags.

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 4085 matching lines @@
       </message>
       <message name="IDS_FLAGS_PRINT_PREVIEW_DESCRIPTION" desc="Description of the 'Print Preview' lab.">
         Enables an in-tab preview of a print operation.
       </message>
       <message name="IDS_FLAGS_DNS_SERVER_NAME" desc="">
         User specified DNS server address.
       </message>
       <message name="IDS_FLAGS_DNS_SERVER_DESCRIPTION" desc="">
         User specified DNS server, which Chrome will use for DNS resolutions rather than the system defaults.
       </message>
+      <message name="IDS_FLAGS_CONFIRM_TO_QUIT_NAME" desc="Name of the 'Confirm to Quit' lab.">
+        Confirm to Quit
+      </message>
+      <message name="IDS_FLAGS_CONFIRM_TO_QUIT_DESCRIPTION" desc="Description of the 'Confirm to Quit' lab.">
+        Receive a prompt before quitting to confirm the action.
+      </message>
 
       <!-- Instant -->
       <message name="IDS_INSTANT_OPT_IN_ENABLE" desc="Button shown in the omnibox dropdown for enabling instant">
         Enable...
       </message>
       <message name="IDS_INSTANT_OPT_IN_NO_THANKS" desc="Button shown in the omnibox dropdodown for not enabling instant">
         No thanks
       </message>
       <message name="IDS_INSTANT_OPT_IN_LABEL" desc="Label shown in the omnibox dropdown for enabling instant">
         Enable Instant for faster searching and browsing?
@@ skipping 509 matching lines @@
         Stop import
       </message>
 
       <message name="IDS_IMPORT_PROGRESS_STATUS_CANCEL_CONFIRM_OK" desc="Import cancellation confirmation accept button">
         Continue Importing
       </message>
       <message name="IDS_IMPORT_PROGRESS_STATUS_CANCEL_CONFIRM_CANCEL" desc="Import cancellation confirmation cancel button">
         Cancel Anyway
       </message>
 
+      <!-- Confirm to quit panel -->
+      <message name="IDS_CONFIRM_TO_QUIT_DESCRIPTION" desc="Instructions for how the user should confirm quitting.">
+        Hold ⌘Q to Quit.
+      </message>
 
       <!-- Importer Lock Dialog -->
       <message name="IDS_IMPORTER_LOCK_TITLE" desc="Dialog title for importer lock dialog">
         Close Firefox Before Importing
       </message>
       <message name="IDS_IMPORTER_LOCK_OK" desc="Text for OK button on dialog">
         Continue
       </message>
       <message name="IDS_IMPORTER_LOCK_CANCEL" desc="Text for Cancel button on dialog">
         Skip Import
@@ skipping 6020 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>