mash: Shell ref clean up for screen lock

chrome/browser/ui/ash/session_controller_client_unittest.cc

Index: chrome/browser/ui/ash/session_controller_client_unittest.cc
diff --git a/chrome/browser/ui/ash/session_controller_client_unittest.cc b/chrome/browser/ui/ash/session_controller_client_unittest.cc
index d67ace335d0b772f9b963b50aba6d463f8b28d2a..1e5d0a5cb6d955daaf3541699bdd26b36df398e8 100644
--- a/chrome/browser/ui/ash/session_controller_client_unittest.cc
+++ b/chrome/browser/ui/ash/session_controller_client_unittest.cc
@@ -98,6 +98,7 @@ class TestSessionController : public ash::mojom::SessionController {
   void SetUserSessionOrder(
       const std::vector<uint32_t>& user_session_order) override {}
   void StartLock(const StartLockCallback& callback) override {}
+  void NotifyChromeLockAnimationsComplete() override {}
   void RunUnlockAnimation(const RunUnlockAnimationCallback& callback) override {
   }
   void NotifyChromeTerminating() override {}