Add PAM session wrapper

remoting/host/BUILD.gn

Index: remoting/host/BUILD.gn
diff --git a/remoting/host/BUILD.gn b/remoting/host/BUILD.gn
index 098a633dcad57a2f456522c1191a6d3e89743c52..aec4fd0b79717e8d62ff1a864200132f8a606a96 100644
--- a/remoting/host/BUILD.gn
+++ b/remoting/host/BUILD.gn
@@ -887,6 +887,17 @@ if (enable_me2me_host) {
     }
 
     if (is_linux) {
+      executable("remoting_user_session") {
+        sources = [
+          "linux/remoting_user_session.cc",
+        ]
+
+        deps = [
+          "//base",
+        ]
+
+        libs = [ "pam" ]
+      }
       copy("remoting_me2me_host_copy_script") {
         sources = [
           "linux/linux_me2me_host.py",
@@ -1081,6 +1092,7 @@ if (enable_me2me_host) {
         ":remoting_native_messaging_host",
         ":remoting_native_messaging_manifests",
         ":remoting_start_host",
+        ":remoting_user_session",
         "//remoting/host/it2me:remote_assistance_host",
         "//remoting/resources",
         "//third_party/icu:icudata",