Suppress tex-2d-rgba-rgba-unsigned_byte.html on chromeOS amd

TBR=kbr@chromium.org

Bug: 1042897
Change-Id: I0c3d58eae57c808afdcd4569e154038db595f609
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2005826Reviewed-by: Shrek Shao <shrekshao@google.com>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Shrek Shao <shrekshao@google.com>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Auto-Submit: Shrek Shao <shrekshao@google.com>
Cr-Commit-Position: refs/heads/master@{#732660}

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

@@ -555,3 +555,4 @@ crbug.com/957807 [ chromeos ] deqp/data/gles2/shaders/swizzles.html [ Skip ]
 
 # ChromeOS: AMD
 crbug.com/995652 [ chromeos amd ] conformance/uniforms/out-of-bounds-uniform-array-access.html [ Skip ]
+crbug.com/1042897 [ chromeos amd ] conformance/textures/webgl_canvas/tex-2d-rgba-rgba-unsigned_byte.html [ RetryOnFailure ]