Causes failures in video related WebGL tests.  Either there is a bug in the implementation or how chrome is using it.

This reverts commit b13daa8f.

Change-Id: Ic0d74840c664bf4de18d85cc3ff7f7153936d9b0
Reviewed-on: https://chromium-review.googlesource.com/262715Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>