Create SigninManagerDelegate java interface

This CL creates a stub for the java |SigninManagerDelegate| interface
and its android implementation |ChromeSigninManagerDelegate|. This
interface will provide with the //chrome level
dependencies it currently has with the objective of componentizing

This change and the next steps are detailed here:

Bug: 963400
Change-Id: I1886d6183433b3ecc277e1d3ad1b82248bb02330
Commit-Queue: Pâris Meuleman <>
Reviewed-by: Boris Sazonov <>
Reviewed-by: Colin Blundell <>
Auto-Submit: Pâris Meuleman <>
Cr-Commit-Position: refs/heads/master@{#662134}
5 files changed