Do not make context current during context deletion. ANGLE will make a context current during deletion, so ANGLE can release related resources, but for an external context, the API user should make sure the native context is current during deleting the ANGLE external context, so ANGLE doesn't need to make the context current. Bug: angleproject:5509 Change-Id: Ia4cee4e3965e9e9e811e3f989f6f6d72bd940f41 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2640593 Commit-Queue: Peng Huang <penghuang@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>