Also mark tex-2d-rgb8ui-rgb_integer-unsigned_byte flaky

This is a follow-up to: https://chromium-review.googlesource.com/c/chromium/src/+/2222881
Adding an additional flake to the list

TBR=ynovikov@chromium.org
TEST=conformance2/textures/image_data/tex-2d-rgb8ui-rgb_integer-unsigned_byte.html
Bug:1087993

Change-Id: I2c2829540060d954c796c736a449e16d4cb84870
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2229480Reviewed-by: Jonathan Ross <jonross@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jonathan Ross <jonross@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774850}

content/test/gpu/gpu_tests/test_expectations/webgl2_conformance_expectations.txt

@@ -304,6 +304,7 @@ crbug.com/1085222 [ win10 intel-0x5912 d3d11 ] deqp/functional/gles3/shaderopera
 crbug.com/1085222 [ win10 intel-0x5912 d3d11 ] deqp/functional/gles3/shaderoperator/binary_operator_01.html [ RetryOnFailure ]
 crbug.com/1085222 [ win10 intel-0x5912 d3d11 ] deqp/functional/gles3/shaderoperator/unary_operator_01.html [ RetryOnFailure ]
 crbug.com/1085222 [ win10 intel-0x5912 d3d11 ] deqp/functional/gles3/shaderoperator/unary_operator_02.html [ RetryOnFailure ]
+crbug.com/1087993 [ win10 intel-0x5912 d3d11 ] conformance2/textures/image_data/tex-2d-rgb8ui-rgb_integer-unsigned_byte.html [ RetryOnFailure ]
 crbug.com/1087993 [ win10 intel-0x5912 d3d11 ] conformance2/textures/image_data/tex-2d-srgb8_alpha8-rgba-unsigned_byte.html [ RetryOnFailure ]
 
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