Supress WebGL2 failure on Linux/NVIDIA/Passthrough.

BUG=chromium:793055
TBR=zmo@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;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
Change-Id: I47ae5b9c289631b8182c6015e0e975dfb341e6ab
Reviewed-on: https://chromium-review.googlesource.com/825147
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#524146}

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

@@ -343,6 +343,8 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         ['linux', 'passthrough', 'opengl', 'nvidia'], bug=766918)
     self.Fail('deqp/functional/gles3/shaderoperator/common_functions.html',
         ['linux', 'passthrough', 'opengl', 'nvidia'], bug=793055)
+    self.Fail('deqp/functional/gles3/shadercommonfunction.html',
+        ['linux', 'passthrough', 'opengl', 'nvidia'], bug=793055)
     self.Fail('deqp/functional/gles3/shaderpackingfunction.html',
         ['linux', 'passthrough', 'opengl', 'nvidia'], bug=794341)