Reland of Split LivenessService out from LibCrosService.

chromeos/dbus/services/liveness_service_provider.h

Index: chromeos/dbus/services/liveness_service_provider.h
diff --git a/chromeos/dbus/services/liveness_service_provider.h b/chromeos/dbus/services/liveness_service_provider.h
index 75092a3d73d79a1e6b1126a7c4a1c4a03179c8c9..26dca2adda4e710a8935b37fdd882c4baaa744bf 100644
--- a/chromeos/dbus/services/liveness_service_provider.h
+++ b/chromeos/dbus/services/liveness_service_provider.h
@@ -26,9 +26,9 @@
 // messages.  It can be tested with the following command:
 //
 // % dbus-send --system --type=method_call --print-reply
-//     --dest=org.chromium.LibCrosService
-//     /org/chromium/LibCrosService
-//     org.chromium.LibCrosServiceInterface.CheckLiveness
+//     --dest=org.chromium.LivenessService
+//     /org/chromium/LivenessService
+//     org.chromium.LivenessServiceInterface.CheckLiveness
 //
 // -> method return sender=:1.9 -> dest=:1.27 reply_serial=2
 //
@@ -36,7 +36,9 @@
 class CHROMEOS_EXPORT LivenessServiceProvider
     : public CrosDBusService::ServiceProviderInterface {
  public:
-  LivenessServiceProvider();
+  // TODO(teravest): Remove the service_interface argument once this is no
+  // longer used by LibCrosService.
+  explicit LivenessServiceProvider(const std::string& service_interface);
   ~LivenessServiceProvider() override;
 
   // CrosDBusService::ServiceProviderInterface overrides:
@@ -53,6 +55,8 @@
   void CheckLiveness(dbus::MethodCall* method_call,
                      dbus::ExportedObject::ResponseSender response_sender);
 
+  std::string service_interface_;
+
   // Keep this last so that all weak pointers will be invalidated at the
   // beginning of destruction.
   base::WeakPtrFactory<LivenessServiceProvider> weak_ptr_factory_;