Fix leak of MemoryObjectManager from context state Bug: chromium:951049 Change-Id: I4e9e2cfe3c287fcb6e536ec20c20acbfda1d8405 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1559203 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Michael Spang <spang@chromium.org>