Show user credentials chooser bubble.

components/password_manager/core/common/password_manager_ui.h

Index: components/password_manager/core/common/password_manager_ui.h
diff --git a/components/password_manager/core/common/password_manager_ui.h b/components/password_manager/core/common/password_manager_ui.h
index f09ccf7d2c50a53a467724562790795ab5664544..e108127a74d243ad269d2a7fcb8cdc3cf4559677 100644
--- a/components/password_manager/core/common/password_manager_ui.h
+++ b/components/password_manager/core/common/password_manager_ui.h
@@ -35,6 +35,10 @@ enum State {
   // The user has blacklisted the site rendered in the current WebContents.
   // The icon needs to be visible, in the blacklisted state.
   BLACKLIST_STATE,
+
+  // The site has asked user to choose a credential. Now we need to display an
+  // Omnibox icon, and pop up a bubble.
+  CREDENTIAL_REQUEST_STATE,
 };
 
 // The position of a password item in a list of credentials.