Use embedded sign in UI for inline sign in flow

google_apis/gaia/gaia_urls.h

Index: google_apis/gaia/gaia_urls.h
diff --git a/google_apis/gaia/gaia_urls.h b/google_apis/gaia/gaia_urls.h
index 51addebe9201ed231790d7eb75ad27e884630d5a..a1bec87a72dbedf5b5f00ee57ca054683d895b07 100644
--- a/google_apis/gaia/gaia_urls.h
+++ b/google_apis/gaia/gaia_urls.h
@@ -33,6 +33,7 @@ class GaiaUrls {
   const GURL& oauth_revoke_token_url() const;
   const GURL& oauth1_login_url() const;
   const GURL& list_accounts_url() const;
+  const GURL& embedded_signin_url() const;
 
   const std::string& oauth1_login_scope() const;
   const std::string& oauth_wrap_bridge_user_info_scope() const;
@@ -75,6 +76,7 @@ class GaiaUrls {
   GURL oauth_revoke_token_url_;
   GURL oauth1_login_url_;
   GURL list_accounts_url_;
+  GURL embedded_signin_url_;
 
   std::string oauth1_login_scope_;
   std::string oauth_wrap_bridge_user_info_scope_;