Re-enable Pixel_WorkerRAF_OOPD pixel test

Bug: 833902
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: Ifc1a9716a293e4e1f9020bb45e2a36336718364f
Reviewed-on: https://chromium-review.googlesource.com/1055650
Commit-Queue: Fernando Serboncini <fserb@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Justin Novosad <junov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558483}

content/test/gpu/gpu_tests/pixel_expectations.py

@@ -101,6 +101,3 @@ class PixelExpectations(GpuTestExpectations):
     self.Flaky('Pixel_WebGLSadCanvas', ['mac'], bug=575305)
     self.Flaky('Pixel_WebGLSadCanvas', ['win', 'intel'], bug=575305)
     self.Fail('Pixel_WebGLSadCanvas', ['android', 'nvidia'], bug=575305)
-
-    # TODO(fserb): temporary suppression for new test.
-    self.Fail('Pixel_WorkerRAF_OOPD', bug=833902)