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This fixes rendering glitches in pages with videos in them
on Android WebView.  I do not yet understand why the GL state
is being changed without going through the gpu command buffer,
but this seems to be happening with Android WebView on pages
that have video elements.  This is a quick fix to resolve
A release-blocking regression.  Further investigation
will be a part of follow-up work: crbug.com/832810

BUG=826636

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Id9b620ffcf74fd674d53a2eadc6efc932e9505d8
Reviewed-on: https://chromium-review.googlesource.com/1012517Reviewed-by: danakj <danakj@chromium.org>
Commit-Queue: Justin Novosad <junov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#551039}