chromeos: Move device shutdown handling out of chrome into ash

ash/wm/lock_state_controller.h

Index: ash/wm/lock_state_controller.h
diff --git a/ash/wm/lock_state_controller.h b/ash/wm/lock_state_controller.h
index 388558db4ab0302dbb62eb3bdf9ab4a5cbe6cf2c..73877ed89338fccd58515dc1a97a5e2eae231f43 100644
--- a/ash/wm/lock_state_controller.h
+++ b/ash/wm/lock_state_controller.h
@@ -22,19 +22,13 @@ class Rect;
 class Size;
 }
 
-namespace service_manager {
-class Connector;
-}
-
 namespace ui {
 class Layer;
 }
 
 namespace ash {
 
-namespace mojom {
-class ShutdownClient;
-}
+class ShutdownController;
 
 namespace test {
 class LockStateControllerTest;
@@ -89,7 +83,7 @@ class ASH_EXPORT LockStateController : public aura::WindowTreeHostObserver,
   // the animation time to finish.
   static const int kShutdownRequestDelayMs;
 
-  explicit LockStateController(service_manager::Connector* connector);
+  explicit LockStateController(ShutdownController* shutdown_controller);
   ~LockStateController() override;
 
   // Starts locking (with slow animation) that can be cancelled.
@@ -247,8 +241,8 @@ class ASH_EXPORT LockStateController : public aura::WindowTreeHostObserver,
   // How long has it been since the request to lock the screen?
   std::unique_ptr<base::ElapsedTimer> lock_duration_timer_;
 
-  // The client that we request to shut down the machine.
-  std::unique_ptr<mojom::ShutdownClient> shutdown_client_;
+  // Controller used to trigger the actual shutdown.
+  ShutdownController* shutdown_controller_;
 
   // Started when we request that the screen be locked.  When it fires, we
   // assume that our request got dropped.