Update behavior of one-click infobar to remove modal dialog, add "undo".

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 db47f71d28c5e21da31a3872390d9b7c1a4e8ff4..0445d966e9639070c5af931dce3a49e746a63e15 100644
--- a/chrome/app/chromium_strings.grd
+++ b/chrome/app/chromium_strings.grd
@@ -784,6 +784,9 @@ The extension "<ph name="EXTENSION_NAME">$1<ex>Gmail Checker</ex></ph>" has been
         <message name="IDS_ONE_CLICK_SIGNIN_INFOBAR_MESSAGE" desc="The string shown in the infobar explaining that the user can connect his profile to a Google account instead of logging in only here.">
           Use this Google Account to sync all your Chromium stuff?
         </message>
+        <message name="IDS_ONE_CLICK_SIGNIN_BUBBLE_MESSAGE" desc="The body of the sync promo NTP bubble.">
+          You're now signed in to Chromium! Your bookmarks, history, and other settings will be synced to your Google Account.
+        </message>
         <message name="IDS_ONE_CLICK_SIGNIN_DIALOG_HEADING" desc="The heading of the reverse auto-login dialog.">
           Sign in to Chromium
         </message>