chromeos: Refactor ash SystemTrayDelegate enterprise methods to mojo

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Chrome OS-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 5539 matching lines @@
   </message>
   <message name="IDS_LOGIN_POD_REMOVE_USER" desc="Login screen user pod menu item text.">
     Remove this person
   </message>
   <message name="IDS_LOGIN_VERSION_LABEL_FORMAT" desc="Login screen version text format.">
     <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> <ph name="PRODUCT_VERSION">$2<ex>15.0.0.0</ex></ph> (Platform <ph name="PLATFORM_VERSION">$3<ex>900.0-11.09.01</ex></ph>) <ph name="DEVICE_SERIAL_NUMBER">$4<ex>SN:123456789ABC</ex></ph>
   </message>
   <message name="IDS_LOGIN_API_KEYS_NOTICE" desc="Notice displayed on the login screen in case if API keys are missing.">
     You will not be able to add users because Google API keys are missing. See <ph name="DETAILS_URL">$1<ex>http://www.example.com</ex></ph> for details.
   </message>
-  <message name="IDS_DEVICE_OWNED_BY_NOTICE" desc="Text for notifications showing that this is managed device.">
-    This device is managed by <ph name="DOMAIN">$1<ex>acmecorp.com</ex></ph>.
-  </message>
-  <message name="IDS_DEVICE_ENTERPRISE_MANAGED_NOTICE" desc="Text for notifications showing that this device is enterprise managed.">
-    This device is enterprise managed
-  </message>
   <message name="IDS_LOGIN_PUBLIC_ACCOUNT_INFO_FORMAT" desc="Template for text shown in the public account user pod, informing the user that this is a public, managed account.">
     Managed by <ph name="DOMAIN">$1<ex>yourdomain.com</ex></ph>
   </message>
   <message name="IDS_LOGIN_PUBLIC_ACCOUNT_SIGNOUT_REMINDER" desc="Text shown in the public account user pod, reminding the user to log out.">
     Your information will be removed from the device when you sign out.
   </message>
   <message name="IDS_LOGIN_PUBLIC_SESSION_LANGUAGE_AND_INPUT" desc="Link in public session pod that shows a section which allows the user to change the UI language and keyboard layout.">
     Language and input
   </message>
   <message name="IDS_LOGIN_PUBLIC_ACCOUNT_ENTER" meaning="Label text for signing in." desc="Label text for the sign-in button in the public account user pod.">
@@ skipping 1122 matching lines @@
     Attempts left: $1
   </message>
   <message name="IDS_REQUEST_PIN_DIALOG_PIN" desc="The Provider Identification Number abbreviation">
     PIN
   </message>
   <message name="IDS_REQUEST_PIN_DIALOG_PUK" desc="The Personal Unlocking Key (as used in mobile phones) abbreviation">
     PUK
   </message>
 
 </grit-part>