Update strings in the avatar bubble

chrome/app/chromium_strings.grd

Index: chrome/app/chromium_strings.grd
diff --git a/chrome/app/chromium_strings.grd b/chrome/app/chromium_strings.grd
index 4b79fe7baf5ee0a682aa52bdb28e196ccc7b8fda..188f463c654a1f80343e9b0eab516a1f369d1094 100644
--- a/chrome/app/chromium_strings.grd
+++ b/chrome/app/chromium_strings.grd
@@ -835,8 +835,11 @@ For Chromium, processes used to display diagnostics information (such as this "a
       <message name="IDS_PROFILES_CONFIRM_SIGNIN_TUTORIAL_TITLE" desc="The title of the tutorial card in the avatar menu bubble view shown when a user signs in to Chromium.">
         You're now signed in to Chromium
       </message>
+      <message name="IDS_PROFILES_WELCOME_UPGRADE_TUTORIAL_TITLE" desc="Title of the tutorial card in the avatar menu bubble view that introduces an upgrade user to the new profile management UI.">
+        This is your Chromium
+      </message>
       <message name="IDS_PROFILES_WELCOME_UPGRADE_TUTORIAL_CONTENT_TEXT" desc="The main content of the tutorial card in the avatar menu bubble view that introduces an upgrade user to the new profile management UI.">
-       Share a computer? Now you can set up Chromium just the way you like it.
+        Share a computer? Now you can set up Chromium just the way you like it.
       </message>
 
       <!-- Account removal view in the avatar menu bubble -->
@@ -849,7 +852,7 @@ For Chromium, processes used to display diagnostics information (such as this "a
 
       <!-- Switch user view in the avatar menu bubble -->
       <message name="IDS_PROFILES_NOT_YOU_CONTENT_TEXT" desc="Main text of the switch user view. for an upgrade user">
-        If you share this computer with <ph name="PROFILE_NAME">$1<ex>Claire</ex></ph>, add yourself to Chromium to browser separately. Otherwise disconnect your Google Account.
+        If you share this computer with <ph name="PROFILE_NAME">$1<ex>Claire</ex></ph>, add yourself to Chromium to browse separately. Otherwise disconnect their Google Account.
       </message>
 
       <!-- One click sign-in infobar -->