Right now b2g uses the old .json manifest format for excluding mochitests. B2G desktop uses the same file, which means we can't disable a test on one platform without doing the other. We need to either create a separate .json for b2g desktop, or switch to using the .ini format. Joel, I know you landed the manifests for mochitest patch, is there a bug tracking converting to the new format?

Joel estimates that getting the initial manifests built out could take a month or more. For now I'll just create a separate b2g-desktop.json and work with that.

to get this in the short term, lets create a new .json file. About 25-33% of the mochitest makefiles are converted to mochitest.ini formats and are being consumed by the build system now. Once those are fully converted, we can make the test runners use these, I imagine it would take a week or so to get the entire test infrastructure using manifests once they are fully implemented.

Oops, forgot to add the manifest to the Makefile in the last patch.