on another remote object. We now unwrap the local DConnectStub and send
the address of the remote object instead, which avoids the creation of an
unnecessary DConnectStub on the remote side. Thanks to Frank Wiegerinck
for finding this bug.
This patch also makes it so that all of the IPC tests depend on no more
than XPCOM. That way it is possible to build IPCDC and XPCOM standalone
without needing disable tests.
These changes do not affect the default build.
