mojo api for view based lockscreen

ash/mojo_interface_factory.cc

Index: ash/mojo_interface_factory.cc
diff --git a/ash/mojo_interface_factory.cc b/ash/mojo_interface_factory.cc
index 8bba0b3f463b43d9694c9ae3ce12f6d514ebc0b2..c8eab24b79be8720e29115c5040156feedcdde94 100644
--- a/ash/mojo_interface_factory.cc
+++ b/ash/mojo_interface_factory.cc
@@ -8,6 +8,7 @@
 
 #include "ash/accelerators/accelerator_controller.h"
 #include "ash/cast_config_controller.h"
+#include "ash/login/lock_screen_controller.h"
 #include "ash/media_controller.h"
 #include "ash/new_window_controller.h"
 #include "ash/session/session_controller.h"
@@ -56,6 +57,12 @@ void BindLocaleNotificationControllerOnMainThread(
       std::move(request));
 }
 
+void BindLockScreenRequestOnMainThread(
+    const service_manager::BindSourceInfo& source_info,
+    mojom::LockScreenRequest request) {
+  Shell::Get()->lock_screen_controller()->BindRequest(std::move(request));
+}
+
 void BindMediaControllerRequestOnMainThread(
     const service_manager::BindSourceInfo& source_info,
     mojom::MediaControllerRequest request) {
@@ -133,6 +140,8 @@ void RegisterInterfaces(
   registry->AddInterface(
       base::Bind(&BindLocaleNotificationControllerOnMainThread),
       main_thread_task_runner);
+  registry->AddInterface(base::Bind(&BindLockScreenRequestOnMainThread),
+                         main_thread_task_runner);
   registry->AddInterface(base::Bind(&BindMediaControllerRequestOnMainThread),
                          main_thread_task_runner);
   registry->AddInterface(