Add constants for new cryptohome API

chromeos/dbus/service_constants.cc

Index: chromeos/dbus/service_constants.cc
diff --git a/chromeos/dbus/service_constants.cc b/chromeos/dbus/service_constants.cc
index 62a79de0685e1cb16404500975f39fbdee584920..7a34bf4ccc10bac2eb5eb91c91d81add30e0a9da 100644
--- a/chromeos/dbus/service_constants.cc
+++ b/chromeos/dbus/service_constants.cc
@@ -38,6 +38,10 @@ const char *kCryptohomeRemoveTrackedSubdirectories =
     "RemoveTrackedSubdirectories";
 const char *kCryptohomeAsyncRemoveTrackedSubdirectories =
     "AsyncRemoveTrackedSubdirectories";
+const char *kCryptohomeDoAutomaticFreeDiskSpaceControl =
+    "DoAutomaticFreeDiskSpaceControl";
+const char *kCryptohomeAsyncDoAutomaticFreeDiskSpaceControl =
+    "AsyncDoAutomaticFreeDiskSpaceControl";
 // Signals
 const char *kSignalAsyncCallStatus = "AsyncCallStatus";
 const char *kSignalTpmInitStatus = "TpmInitStatus";