Adding mojo calls for easy unlock service

chrome/browser/chromeos/login/lock/screen_locker.h

Index: chrome/browser/chromeos/login/lock/screen_locker.h
diff --git a/chrome/browser/chromeos/login/lock/screen_locker.h b/chrome/browser/chromeos/login/lock/screen_locker.h
index dba07eb44bdd26fa11b408c417e09a9f89f03d63..acbb679ad6a62ab0504a54b47a5a859da391cccb 100644
--- a/chrome/browser/chromeos/login/lock/screen_locker.h
+++ b/chrome/browser/chromeos/login/lock/screen_locker.h
@@ -35,6 +35,7 @@ class ExtendedAuthenticator;
 class AuthFailure;
 class ScreenlockIconProvider;
 class WebUIScreenLocker;
+class ViewScreenLocker;
 
 namespace test {
 class ScreenLockerTester;
@@ -183,6 +184,7 @@ class ScreenLocker : public AuthStatusConsumer,
   friend class test::ScreenLockerViewsTester;
   friend class test::WebUIScreenLockerTester;
   friend class WebUIScreenLocker;
+  friend class ViewScreenLocker;
 
   // Track whether the user used pin or password to unlock the lock screen.
   // Values corrospond to UMA histograms, do not modify, or add or delete other
@@ -233,7 +235,6 @@ class ScreenLocker : public AuthStatusConsumer,
 
   // Delegate used to talk to the view.
   Delegate* delegate_ = nullptr;
-  bool owns_delegate_ = false;
 
   // Users that can unlock the device.
   user_manager::UserList users_;
@@ -280,6 +281,9 @@ class ScreenLocker : public AuthStatusConsumer,
   device::mojom::FingerprintPtr fp_service_;
   mojo::Binding<device::mojom::FingerprintObserver> binding_;
 
+  // ViewScreenLocker instance in use.
+  std::unique_ptr<ViewScreenLocker> view_screen_locker_;
+
   base::WeakPtrFactory<ScreenLocker> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenLocker);