Now that GMPParent detects whether gmp-clearkey can decode using AAC/H.264
using WMF before reporting gmp-clearkey's GMPParent can decode AAC/H.264, we
don't need the GMPDecryptorCallback::SetCapabilities() callback from the GMP to
signal to the PDMFactory that the GMP can decode. We can now trust what the
GMPService tells us.
So we can remove the "waiting for CDM caps" step in the state machine's startup
sequence. And all the plumbing. :)
If we need more caps, like for an decode-and-render path, we can declare those
as API strings in the info file.
MozReview-Commit-ID: E0QhU4cYhjo
--HG--
extra : rebase_source : 7d15ab6a45bac88c15c053f416d941b5fe0807b0
46a1552995