Prevent Chrome from quitting when apps are open. (Mac)

chrome/app/google_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This file contains definitions of strings that are specific to
 Google Chrome. These strings will be translated for each locale that Google
 Chrome supports. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/google_chrome_strings.h" type="rc_header">
       <emit emit_type='prepend'></emit>
@@ skipping 581 matching lines @@
       <message name="IDS_SINGLE_DOWNLOAD_REMOVE_CONFIRM_EXPLANATION" desc="Explanation of the dialog asking for user confirmation to close the browser when one download is in progress.">
         A download is currently in progress. Do you want to exit Google Chrome and cancel the download?
       </message>
       <message name="IDS_MULTIPLE_DOWNLOADS_REMOVE_CONFIRM_EXPLANATION" desc="Explanation of the dialog asking for user confirmation to close the browser when multiple downloads are in progress.">
         Downloads are currently in progress. Do you want to exit Google Chrome and cancel the downloads?
       </message>
       <message name="IDS_DOWNLOAD_REMOVE_CONFIRM_OK_BUTTON_LABEL" desc="Button text for OKing to close the browser when one or more downloads are in progress.">
         Yes, exit Chrome
       </message>
 
+      <!-- Quit all apps confirmation dialog -->
+      <if expr="is_macosx">
+        <message name="IDS_QUIT_WITH_APPS_TITLE" desc="Title for a notification explaining that Chrome is running in the background.">
+          Google Chrome is running in the background.
+        </message>
+      </if>
+
       <!-- "Create application shortcuts" dialog -->
       <if expr="is_posix and not is_macosx and not is_ios">
         <message name="IDS_CREATE_SHORTCUTS_ERROR_LABEL" desc="Contents of the main label in the error dialog box when creating an application shortcut failed for unknown reasons.">
           Google Chrome could not create an application shortcut.
         </message>
       </if>
 
       <!-- Autolaunch infobar -->
       <message name="IDS_AUTO_LAUNCH_INFOBAR_TEXT" desc="The text to show in the infobar when Chrome was automatically launched on startup">
         Google Chrome is configured to automatically launch when you start your computer.
@@ skipping 526 matching lines @@
         <message name="IDS_NEW_TAB_OTR_EXTENSIONS_MESSAGE"
                  desc="Explanation in a new OTR window that extensions have been disabled while in OTR.">
           Because Google Chrome does not control how extensions handle your personal data, all extensions have been disabled for incognito windows. You can reenable them individually in the
           <ph name="BEGIN_LINK">&lt;a href="$1"&gt;</ph>extensions manager<ph name="END_LINK">&lt;/a&gt;<ex>&lt;/a&gt;</ex></ph>.
         </message>
       </if>
 
     </messages>
   </release>
 </grit>