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This patch may have been leading to regressions in memory on Windows.
Temporarily disabling mip map generation to test whether this is the
culprit.

R=khushalsagar

Bug: 867468
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I74467e2f620ecb15af86a6a82c6b772d03c739d1
Reviewed-on: https://chromium-review.googlesource.com/1157273Reviewed-by: Khushal <khushalsagar@chromium.org>
Commit-Queue: Eric Karl <ericrk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579657}