Implement end-preview flow with views

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 ac115e9f5a59bbb3625d2f16a46a48219e367348..905f92e883b354cfe388c0c9f2a34eab253982c8 100644
--- a/chrome/app/chromium_strings.grd
+++ b/chrome/app/chromium_strings.grd
@@ -835,6 +835,9 @@ For Chromium, processes used to display diagnostics information (such as this "a
       <message name="IDS_PROFILES_PREVIEW_TUTORIAL_CONTENT_TEXT" desc="The main content of the tutorial card in the avatar menu bubble view that asks the user to preview the new profile management UI.">
        Try the new way to use Chromium with your Google Account and on shared computers.
       </message>
+      <message name="IDS_PROFILES_FEEDBACK_TUTORIAL_CONTENT_TEXT" desc="The main content of the tutorial card in the avatar menu bubble view that asks the user to send feedback about the new profile management UI.">
+       You're previewing the new Chromium.
+      </message>
 
       <!-- Account removal view in the avatar menu bubble -->
       <message name="IDS_PROFILES_ACCOUNT_REMOVAL_TEXT" desc="Main text of the account removal view when removing a secondary account.">
@@ -844,6 +847,11 @@ For Chromium, processes used to display diagnostics information (such as this "a
         You're using <ph name="PROFILE_EMAIL">$1<ex>jessica@gmail.com</ex></ph> to sync your Chromium stuff. To update your sync preference or to use Chromium without a Google account, visit <ph name="SETTINGS_LINK">$2<ex>settings</ex></ph>.
       </message>
 
+      <!-- End-preview view in the avatar menu bubble -->
+      <message name="IDS_PROFILES_END_PREVIEW_TEXT" desc="Main text of the end-preview view.">
+        Thanks for trying out the new Chromium. Chromium needs to restart to make sure you've saved any open work before continuing.
+      </message>
+
       <!-- Sync Promo New Tab Page bubble strings -->
       <message name="IDS_SYNC_PROMO_NTP_BUBBLE_MESSAGE_NEW" desc="The body of the sync promo NTP bubble.">
         Now that you're signed in, you can get your tabs, bookmarks and other Chromium stuff across your laptop, phone and tablet. You will also receive more relevant suggestions and features on Google services.