kimvde 92a06606b4 Remove ability to run the DefaultVideoCompositor on its own GL thread.
- It's never used and handling multi-threading is costly.
- If the VideoCompositor and the VideoFrameProcessors use separate
threads and the same GlObjectsProvider, the GlObjectsProvider is
accessed from multiple threads. This class doesn't seem designed for
multi-threading.

PiperOrigin-RevId: 723448013
2025-02-05 03:55:42 -08:00
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