Created optional multiprofiles introduction dialog.

chrome/app/chromeos_strings.grdp

Index: chrome/app/chromeos_strings.grdp
diff --git a/chrome/app/chromeos_strings.grdp b/chrome/app/chromeos_strings.grdp
index 4752eeba67743095eb0f32daac3224baa07e5f8c..139c8de54d50ed2b23c4142724c56b2cbfdf954d 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -3833,6 +3833,20 @@ Battery full
     Disable on <ph name="DOMAIN">$1<ex>example.com</ex></ph>
   </message>
 
+  <!-- Multi-profiles mode -->
+  <message name="IDS_MULTIPROFILES_INTRO_HEADLINE" desc="Describes which feature multi-profiles intro dialog presents.">
+    Multiple sign-in
+  </message>
+  <message name="IDS_MULTIPROFILES_INTRO_MESSAGE" desc="Content of the multi-profiles 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 multi-profiles 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>.