Add tooltips to cr-policy-indicator

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- ChromeOS-specific strings (included from generated_resources.grd).
      Everything in this file is wrapped in <if expr="chromeos">. -->
 <grit-part>
   <message name="IDS_EMPTY_STRING" desc="Empty string, exist only to make code generic. No translation required.">
   </message>
   <!-- Idle logout dialog for retail mode -->
   <message name="IDS_IDLE_LOGOUT_TITLE" desc="Dialog title for the idle logout dialog. Used in retail mode only.">
     Are you still there?
   </message>
@@ skipping 3138 matching lines @@
   </message>
   <message name="IDS_TERMS_OF_SERVICE_SCREEN_BACK_BUTTON" desc="Text of the back button on Terms of Service screen.">
     Back
   </message>
   <message name="IDS_TERMS_OF_SERVICE_SCREEN_ACCEPT_BUTTON" desc="Text of the accept button on the Terms of Service screen.">
     Accept and continue
   </message>
   <message name="IDS_OPTIONS_CONTROLLED_SETTING_OWNER" desc="Text displayed in the controlled settings bubble when a setting's value can be edited only by the owner.">
     This setting is managed by the device owner, <ph name="OWNER_EMAIL">$1<ex>john@google.com</ex></ph>.
   </message>
-  <message name="IDS_OPTION_DISABLED_BY_POLICY" desc="Text displayed in the controlled settings bubble when a setting's value is enforced by enterprise policy.">
-    This option is controlled by enterprise policy. Please contact your administrator for more information.
-  </message>
   <message name="IDS_OPTIONS_CONTROLLED_SETTING_SHARED" desc="Text displayed in the controlled settings bubble when a setting's value belongs to the primary user but can be edited.">
     This setting belongs to <ph name="OWNER_EMAIL">$1<ex>john@google.com</ex></ph>.
   </message>
   <message name="IDS_OPTIONS_CONTROLLED_SETTINGS_SHARED" desc="Text displayed in the controlled settings bubble when it is shown for a group of settings which belong to the primary user but can be edited.">
     These settings belong to <ph name="OWNER_EMAIL">$1<ex>john@google.com</ex></ph>.
   </message>
   <message name="IDS_OPTIONS_CONTROLLED_SETTING_SHARED_SCREEN_LOCK" desc="Text displayed in the controlled settings bubble for the screen lock option, indicating screen lock is enabled if it's set for any profile in a session.">
     Passwords are required for signed-in users, as one or more users has this setting turned on.
   </message>
   <message name="IDS_OPTIONS_SETTINGS_LANGUAGES_CHEWING_SETTINGS_TITLE"
@@ skipping 3227 matching lines @@
     Installing
   </message>
   <message name="IDS_FLAGS_PRINTER_PROVIDER_SEARCH_APP_NAME" desc="Name of the flag used to enable launching Chrome Web Store Gallery widget app for searching for printer provider apps.">
     Chrome Web Store Gallery app for printer drivers
   </message>
   <message name="IDS_FLAGS_PRINTER_PROVIDER_SEARCH_APP_DESCRIPTION" desc="Description of a flag in chrome://flags that enables launching Chrome Web Store Gallery widget app for searching for printer provider apps.">
     Enables Chrome Web Store Gallery app for printer drivers. The app searches Chrome Web Store for extensions that support printing to a USB printer with specific USB ID.
   </message>
 
 </grit-part>