"up-to-date" should only use hyphens when used as compound modifier of a noun

chrome/app/settings_chromium_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific Chromium strings (included from chromium_strings.grd). -->
 <grit-part>
   <!-- About Page -->
   <if expr="not chromeos">
     <message name="IDS_SETTINGS_ABOUT_PROGRAM" desc="Menu title for the About Chromium page.">
       About Chromium
     </message>
     <message name="IDS_SETTINGS_GET_HELP_USING_CHROME" desc="Text of the button which takes the user to the Chrome help page.">
       Get help with Chromium
     </message>
     <message name="IDS_SETTINGS_UPGRADE_UPDATING" desc="Status label: Updating Chromium">
       Updating Chromium
     </message>
     <message name="IDS_SETTINGS_UPGRADE_SUCCESSFUL_RELAUNCH" desc="Status label: Successfully updated Chromium">
-      Nearly up-to-date! Relaunch Chromium to finish updating.
+      Nearly up to date! Relaunch Chromium to finish updating.
     </message>
     <message name="IDS_SETTINGS_UPGRADE_UP_TO_DATE" desc="Status label: Already up to date (Chromium)">
       Chromium is up to date.
     </message>
   </if>
   <if expr="chromeos">
     <message name="IDS_SETTINGS_ABOUT_PROGRAM" desc="Menu title for the About Chromium page.">
       About Chromium OS
     </message>
     <message name="IDS_SETTINGS_GET_HELP_USING_CHROME" desc="Text of the button which takes the user to the Chrome help page.">
@@ skipping 65 matching lines @@
     <message name="IDS_SETTINGS_SYSTEM_BACKGROUND_APPS_LABEL" desc="Label for the checkbox to allow apps to run in the background, when Chrome is closed.">
       Continue running background apps when Chromium is closed
     </message>
   </if>
 
   <!-- Reset Page -->
   <message name="IDS_SETTINGS_RESET_PROFILE_FEEDBACK" desc="Feedback label in the Reset Profile Settings dialog">
     Help make Chromium better by reporting the current settings.
   </message>
 </grit-part>