Seems that the info regarding namespace, cppNamespace, namespaceURI, etc... is already embedded in the .in files, hence not needed anymore as options to make_names.pl.
Created attachment 21945 [details] remove unnecessary make_names options from GNUmakefile.am and DerivedSources.make
Comment on attachment 21945 [details] remove unnecessary make_names options from GNUmakefile.am and DerivedSources.make r=me
Thanks. Landed in r34836