Refactor dbus SessionManagerInterface.StartArcInterface

chromeos/BUILD.gn

Index: chromeos/BUILD.gn
diff --git a/chromeos/BUILD.gn b/chromeos/BUILD.gn
index 76f79d748cf236662dd8ae710a5b2a46697c9710..877793232176ceed6c438023a2f97010a8e33c83 100644
--- a/chromeos/BUILD.gn
+++ b/chromeos/BUILD.gn
@@ -23,6 +23,7 @@ component("chromeos") {
     ":authpolicy_proto",
     ":biod_proto",
     ":cryptohome_proto",
+    ":login_manager_proto",
     ":media_perception_proto",
     ":power_manager_proto",
     "//base",
@@ -747,6 +748,14 @@ proto_library("cryptohome_proto") {
   proto_out_dir = "chromeos/dbus/cryptohome"
 }
 
+proto_library("login_manager_proto") {
+  sources = [
+    "//third_party/cros_system_api/dbus/login_manager/arc.proto",
+  ]
+
+  proto_out_dir = "chromeos/dbus/login_manager"
+}
+
 proto_library("attestation_proto") {
   sources = [
     "dbus/proto/attestation.proto",