Add mac-only "Set Up Automatic Updates..." button to the new about page.

chrome/app/settings_strings.grdp

Index: chrome/app/settings_strings.grdp
diff --git a/chrome/app/settings_strings.grdp b/chrome/app/settings_strings.grdp
index 57ad06f6b08ab8ea394c71ae93f4f960467a4297..b228dc559468da3485c1266669b51c181c88cda6 100644
--- a/chrome/app/settings_strings.grdp
+++ b/chrome/app/settings_strings.grdp
@@ -109,6 +109,14 @@
   <message name="IDS_SETTINGS_ABOUT_UPGRADE_CHECK_STARTED" desc="Status label: About to start checking for updates">
     Checking for updates
   </message>
+  <if expr="is_macosx">
+    <message name="IDS_ABOUT_CHROME_AUTOUPDATE_ALL" desc="The 'Automatically update Chrome for all users.' button in the About window.  Mac-only.">
+      Automatically update Chrome for all users.
+    </message>
+    <message name="IDS_ABOUT_CHROME_AUTOUPDATE_ALL_IS_ON" desc="The text in About Page to indicate automatic update is turned on.  Mac-only.">
+      Automatic updates are turned on.
+    </message>
+  </if>
 
   <!-- Accessibility Page -->
   <message name="IDS_SETTINGS_ACCESSIBILITY" desc="Name of the settings page which displays accessibility preferences.">