Revert of Update pixel test expectation and add new worker tests (patchset #7 id:120001 of https://codereview.chromium.org/2358833002/ )

Reason for revert:
Appears to have broken pixel_tests on Win7 Release (NVIDIA) and Linux Release (NVIDIA) bots.

Original issue's description:
> Update pixel test expectation and add new worker tests
>
> In the previous CL: https://codereview.chromium.org/2328463004/ where
> the commit() function is implemented, we add a new pixel test and put its
> expectation to fail. Now that the reference image has been generated on
> all GPU waterfall bots, it is time to update the expectation.
>
> This CL also adds a new test to make sure that WebGL's commit()
> is behaving as expected on a worker thread.
>
> BUG=563852
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
>
> Committed: https://crrev.com/ec8349cfc41f8abb93e5b60561b3fbe3d541fb05
> Cr-Commit-Position: refs/heads/master@{#420304}

TBR=junov@chromium.org,kbr@chromium.org,zmo@chromium.org,bajones@chromium.org,xidachen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=563852

Review-Url: https://codereview.chromium.org/2359123002
Cr-Commit-Position: refs/heads/master@{#420313}
3 files changed