Created optional multiprofiles introduction dialog.

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="pp_ifdef('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 3818 matching lines @@
   <message name="IDS_PLATFORM_VERIFICATION_DIALOG_HEADLINE" desc="The label to describe what the dialog wants to confirm.">
     <ph name="DOMAIN">$1<ex>example.com</ex></ph> requires unique identification of your device, by Google, to enable an enhanced playback experience. <ph name="LEARN_MORE">$2<ex>Learn more</ex></ph>.
   </message>
   <message name="IDS_PLATFORM_VERIFICATION_DIALOG_ALLOW" desc="The button label to allow access of HD playback.">
     OK, I got it
   </message>
   <message name="IDS_PLATFORM_VERIFICATION_DIALOG_DENY" desc="The button label to deny access of HD playback.">
     Disable on <ph name="DOMAIN">$1<ex>example.com</ex></ph>
   </message>
 
+  <!-- Multiprofiles mode -->
+  <message name="IDS_MULTIPROFILES_INTRO_HEADLINE" desc="Describes which feature multiprofiles intro dialog presents.">
+    Multiple sign-in
+  </message>
+  <message name="IDS_MULTIPROFILES_INTRO_MESSAGE" desc="Content of the multiprofiles intro dialog shown when the user adds another user in multi-profiles mode.">
+     This feature allows you to access quickly any signed-in user without requiring a password.
+  </message>
+  <message name="IDS_MULTIPROFILES_INTRO_EXPLANATION" desc="Content of the multiprofiles intro dialog shown when the user adds another user in multi-profiles mode.">
+    Only use this feature with accounts you trust.
+  </message>
+  <message name="IDS_MULTIPROFILES_INTRO_NOSHOW_AGAIN" desc="In multi-profiles intro dialog, text for no-show-again option.">
+    Got it, don't show me this again.
+  </message>
+
   <!-- First-run tutorial -->
   <message name="IDS_FIRST_RUN_GREETING_STEP_HEADER" desc="Greeting message shown as header of the first dialog of first-run tutorial.">
     Howdy, <ph name="USER_GIVEN_NAME">$1<ex>John</ex></ph>.
   </message>
   <message name="IDS_FIRST_RUN_GREETING_STEP_HEADER_GENERAL" desc="Greeting message shown as header of the first dialog of first-run tutorial in case when we don't know user's given name.">
     Howdy.
   </message>
   <message name="IDS_FIRST_RUN_GREETING_STEP_TEXT_1" desc="First part of message shown on the first dialog of firsr-run tutorial.">
     Welcome to the Chromebook family. This is no ordinary computer.
   </message>
@@ skipping 162 matching lines @@
     We see that you've ordered a replacement charger.
   </message>
   <message name="IDS_CHARGER_REPLACEMENT_CHARGER_MORE_INFO" desc="Text for fining more info for charger">
     You can find more info at 
   </message>
   <message name="IDS_CHARGER_REPLACEMENT_DIALOG_TITLE" desc="Title of the charger replacement UI dialg">
     Check charger
   </message>
 
 </grit-part>