WebAudioSourceProvider.h always needs to be included since AudioSourceProviderGStreamer inherits from WebAudioSourceProvider.
Pull request: https://github.com/WebKit/WebKit/pull/20674
Committed 270898@main (579a9e5c3ee4): <https://commits.webkit.org/270898@main> Reviewed commits have been landed. Closing PR #20674 and removing active labels.