The CDM headers have removed the CDM 9 interface, and since we want to pull new headers to support encrypted AV1 we need to remove our usage on CDM interface 9. We haven't been shipping CDM 9 for some time now, since at least 68, so we should be able to just yank the code.
Bug 1623661 Comment 0 Edit History
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The CDM headers have removed the CDM 9 interface, and since we want to pull new headers to support encrypted AV1 we need to remove our usage on CDM interface 9. We haven't been shipping CDM 9 for some time now, since at least 68, so we should be able to just yank the code. See bug 1487811 for the last time we removed a CDM interface.