cros: DBUS client to interact with fingerprint DBUS API.

chromeos/BUILD.gn

Index: chromeos/BUILD.gn
diff --git a/chromeos/BUILD.gn b/chromeos/BUILD.gn
index a4413c8a74c3de979b5e41b2e62e6e853db738ff..99fa426f41ef9a69081f2ff61c79772e076b4010 100644
--- a/chromeos/BUILD.gn
+++ b/chromeos/BUILD.gn
@@ -131,6 +131,8 @@ component("chromeos") {
     "dbus/audio_node.h",
     "dbus/auth_policy_client.cc",
     "dbus/auth_policy_client.h",
+    "dbus/biod/biod_client.cc",
+    "dbus/biod/biod_client.h",
     "dbus/blocking_method_caller.cc",
     "dbus/blocking_method_caller.h",
     "dbus/cras_audio_client.cc",
@@ -603,6 +605,7 @@ test("chromeos_unittests") {
     "cert_loader_unittest.cc",
     "cryptohome/homedir_methods_unittest.cc",
     "cryptohome/system_salt_getter_unittest.cc",
+    "dbus/biod/biod_client_unittest.cc",
     "dbus/blocking_method_caller_unittest.cc",
     "dbus/cras_audio_client_unittest.cc",
     "dbus/cros_disks_client_unittest.cc",