New avatar menu: For supervised users, show "(Supervised)" in the avatar button

chrome/app/generated_resources.grd

Index: chrome/app/generated_resources.grd
diff --git a/chrome/app/generated_resources.grd b/chrome/app/generated_resources.grd
index 6c0994ce82cb12629fccb861f7c5c0d0c081c248..3f355b89f06236e6f6c32e39592a471c8a5b8277 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -7482,6 +7482,9 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_MANAGED_USER_AVATAR_LABEL" desc="A label for the supervised user which is used in the avatar menu and as a label in the titlebar.">
         Supervised user
       </message>
+      <message name="IDS_MANAGED_USER_NEW_AVATAR_LABEL" desc="A label for the supervised user which is used in the new avatar menu, next to the username.">
+        (Supervised)
+      </message>
 
       <!-- Supervised User Block Interstitial data -->
       <message name="IDS_BLOCK_INTERSTITIAL_TITLE" desc="A title for the supervised-user block interstitial page.">