Add a switch for enabling the ManagePasswordsBubbleUI to the about:flags page.

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 b497bc179200923d30453966f1ab5945f02ddf26..83fa291bc951c8027f279f4ae61ea6776b4b07a4 100644
--- a/chrome/app/generated_resources.grd
+++ b/chrome/app/generated_resources.grd
@@ -6783,6 +6783,12 @@ Keep your key file in a safe place. You will need it to create new versions of y
       <message name="IDS_FLAGS_SEARCH_BUTTON_IN_OMNIBOX_ENABLED" desc="Option in a drop-down menu to enable the display of the search button at all times (on all pages).">
         Enabled on all pages
       </message>
+      <message name="IDS_FLAGS_ENABLE_PASSWORD_BUBBLE_NAME" desc="Title for the flag to enable the manage passwords bubble feature.">
+        Enable Passwords Bubble
+      </message>
+      <message name="IDS_FLAGS_ENABLE_PASSWORD_BUBBLE_DESCRIPTION" desc="Description for the flag to enable the Manage Passwords Bubble feature.">
+        Enables the Passwords Bubble. The Passwords Bubble provides an easy way to store and manage passwords for a website. It replaced the infobad for saving passwords.
+      </message>
 
       <!-- Crashes -->
       <message name="IDS_CRASHES_TITLE" desc="Title for the chrome://crashes page.">