Add D-bus service constants for midis.

These are used by platform2/midis

BUG=chromium:701005
TEST=Chrome OS boots and midis executes successfully.
CQ-DEPEND=CL:624560

Change-Id: Ic2856ac4742c1e5a7ca18130e654c3eb775422f8
Reviewed-on: https://chromium-review.googlesource.com/624662
Commit-Ready: Prashant Malani <pmalani@google.com>
Tested-by: Prashant Malani <pmalani@google.com>
Reviewed-by: Dan Erat <derat@chromium.org>
diff --git a/dbus/service_constants.h b/dbus/service_constants.h
index f3d7bef..4fb1891 100644
--- a/dbus/service_constants.h
+++ b/dbus/service_constants.h
@@ -1020,4 +1020,12 @@
 const char kBootstrapMojoConnection[] = "BootstrapMojoConnection";
 }  // namespace arc_oemcrypto
 
+namespace midis {
+constexpr char kMidisServiceName[] = "org.chromium.Midis";
+constexpr char kMidisServicePath[] = "/org/chromium/Midis";
+constexpr char kMidisInterfaceName[] = "org.chromium.Midis";
+// Methods
+constexpr char kBootstrapMojoConnectionMethod[] = "BootstrapMojoConnection";
+}  // namespace midis
+
 #endif  // SYSTEM_API_DBUS_SERVICE_CONSTANTS_H_