IPDL has a native array type

Probably worth posting here, to make sure everyone writing IPDL 
protocols knows about it.

Last week I added a native array type to IPDL, so that instead of 
writing specifications like

   include "nsTArray";
   using nsTArray<nsCString>;
   protocol Foo {
     child: Msg(nsTArray<nsCString> args);
   };

one can now write

   protocol Foo {
     child: Msg(nsCString[] args);
   };

Because the native IPDL array type plays well with IPDL actor types and 
unions (which nsTArray does *not*), and because the syntax is simpler, I 
don't hesitate to say that nsTArray should be banned from protocols.

Cheers,
Chris