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

chrome/app/chromium_strings.grd

Index: chrome/app/chromium_strings.grd
diff --git a/chrome/app/chromium_strings.grd b/chrome/app/chromium_strings.grd
index a7d38917bb8cb82b1843af58632fab9a1c4c6e55..41ac1deea72a41d02ac24b4b37a28c56b1399645 100644
--- a/chrome/app/chromium_strings.grd
+++ b/chrome/app/chromium_strings.grd
@@ -675,6 +675,13 @@ Chromium is unable to recover your settings.
         Yes, exit Chromium
       </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.">
+          Chromium 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.">
@@ -1184,7 +1191,7 @@ Signing in anyway will merge Chromium information like bookmarks, history, and o
       <message name="IDS_EXTENSIONS_SETTINGS_API_SECOND_LINE_START_AND_SEARCH" desc="Second line in the Settings API bubble. Only shown if the secondary change by the extension was both the start page and the search engine. See IDS_EXTENSIONS_SETTINGS_API_SECOND_LINE_START_PAGES for reason for triple quotes.">
         ''' It also controls what page is shown when you start Chromium or search from the Omnibox. '''
       </message>
-      
+
       <!-- Update bubble -->
       <message name="IDS_REINSTALL_APP" desc="Text for the button the user clicks to reinstall the app.">
         Reinstall Chromium