Suppress flaky texturespecification/random_teximage2d_2d.html on Linux NVIDIA.

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

Index: content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
diff --git a/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py b/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
index aa97329960d2ce1f086db39fadd15b83021ad7c2..fc69301452d500529fb92c89ec9b1bdd83be6aae 100644
--- a/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
+++ b/content/test/gpu/gpu_tests/webgl2_conformance_expectations.py
@@ -470,9 +470,12 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
         ['linux', 'opengl'], bug=483282)
     self.Fail('conformance2/reading/read-pixels-pack-parameters.html',
         ['linux', 'opengl'], bug=483282)
+
+    # Linux NVIDIA
+    # This test is flaky both with and without ANGLE.
     self.Flaky('deqp/functional/gles3/texturespecification/' +
         'random_teximage2d_2d.html',
-        ['linux', 'opengl', 'nvidia'], bug=618447)
+        ['linux', 'nvidia'], bug=618447)
 
     # Linux Intel
     self.Fail('deqp/functional/gles3/shaderderivate_dfdx.html',