Add ink drop ripple to status tray

ash/common/system/user/tray_user.h

Index: ash/common/system/user/tray_user.h
diff --git a/ash/common/system/user/tray_user.h b/ash/common/system/user/tray_user.h
index 1373db336a16730d7633c08e3b7465b4378e9dbd..5ab80363b216e24aa69fd58c9ef1502f68c6f6e4 100644
--- a/ash/common/system/user/tray_user.h
+++ b/ash/common/system/user/tray_user.h
@@ -60,6 +60,8 @@ class ASH_EXPORT TrayUser : public SystemTrayItem, public UserObserver {
   // Use for access inside of tests.
   tray::UserView* user_view_for_test() const { return user_; }
 
+  bool is_avatar_visible() const { return avatar_ != nullptr; }
+
  private:
   // Overridden from SystemTrayItem.
   views::View* CreateTrayView(LoginStatus status) override;