Resupress some WebGL2 tests on ANGLE GL + Passthrough.

BUG=693090
TBR=zmo@chromium.org

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: I882da7cb607592a58d9a022f5af656cb45278c2a
Reviewed-on: https://chromium-review.googlesource.com/1028171
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553592}

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

@@ -194,6 +194,8 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         ['win', ('nvidia', 0x1cb3), 'opengl'], bug=703779)
     self.Flaky('conformance2/rendering/attrib-type-match.html',
         ['win', 'nvidia', 'opengl'], bug=782254)
+    self.Fail('deqp/functional/gles3/shaderpackingfunction.html',
+        ['win', 'nvidia', 'opengl'], bug=795030)
     self.Skip('conformance2/rendering/blitframebuffer-size-overflow.html',
         ['win', 'nvidia', 'opengl'], bug=830046)
     self.Flaky('conformance2/transform_feedback/switching-objects.html',
@@ -324,6 +326,12 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         bug=602688)
     self.Fail('deqp/functional/gles3/integerstatequery.html',
         ['passthrough', 'opengl'], bug=602688)
+    self.Fail('conformance/textures/canvas/' +
+        'tex-2d-alpha-alpha-unsigned_byte.html',
+        ['passthrough', 'opengl'], bug=602688)
+    self.Fail('conformance/textures/canvas/' +
+        'tex-2d-luminance_alpha-luminance_alpha-unsigned_byte.html',
+        ['passthrough', 'opengl'], bug=602688)
 
     # Passthrough command decoder / OpenGL / Windows
     self.Fail('deqp/functional/gles3/fbocompleteness.html',