Reduce webgl2 suppression for gl-bindAttribLocation-aliasing-inactive.html

Now applies only to no_angle configurations.

TBR=kbr@chromium.org

Bug: 829541
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: Ie12f38d0f6c181a9652c71b54139533986ff1f16
Reviewed-on: https://chromium-review.googlesource.com/1024400
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#554889}

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

@@ -65,9 +65,11 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
     self.Fail('conformance2/glsl3/tricky-loop-conditions.html', bug=483282)
     self.Fail('conformance2/glsl3/array-length-side-effects.html',
         bug=2142) # angle bug ID
+
+    # All non-ANGLE platforms.
     self.Fail('conformance2/attribs/' +
         'gl-bindAttribLocation-aliasing-inactive.html',
-        bug=829541)
+        ['no_angle'], bug=829541)
 
     # OffscreenCanvas.commit
     # TODO(fserb): Tests are not up to date with proposed API