Mark flaky webgl conformance test as flaky

content/test/gpu/gpu_tests/webgl_conformance_expectations.py

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 import os
 
 from gpu_tests.gpu_test_expectations import GpuTestExpectations
 
 # See the GpuTestExpectations class for documentation.
 
 class WebGLConformanceExpectations(GpuTestExpectations):
@@ skipping 47 matching lines @@
               'pow-of-small-constant-in-user-defined-function.html',
         ['win'], bug=485641)
     self.Fail('conformance/glsl/bugs/sampler-struct-function-arg.html',
         ['win'], bug=485642)
     # Note that the following test seems to pass, but it may still be flaky.
     self.Fail('conformance/glsl/constructors/' +
               'glsl-construct-vec-mat-index.html',
               ['win'], bug=525188)
     self.Flaky('conformance/extensions/ext-disjoint-timer-query.html',
         ['win'], bug=588617)
+    self.Flaky('deqp/data/gles2/shaders/constants.html', ['win'], bug=594922)
 
     # Win7 / Intel failures
     self.Fail('conformance/textures/misc/' +
               'copy-tex-image-and-sub-image-2d.html',
               ['win7', 'intel'])
 
     # Win / AMD flakiness seen on new tryservers.
     # It's unfortunate that this suppression needs to be so broad, but
     # basically any test that uses readPixels is potentially flaky, and
     # it's infeasible to suppress individual failures one by one.
@@ skipping 332 matching lines @@
     self.Fail('conformance/textures/misc/texture-npot.html',
         ['chromeos', ('intel', 0xa011)], bug=375554)
     self.Fail('conformance/textures/misc/texture-npot-video.html',
         ['chromeos', ('intel', 0xa011)], bug=375554)
     self.Fail('conformance/textures/misc/texture-size.html',
         ['chromeos', ('intel', 0xa011)], bug=375554)
     self.Fail('conformance/uniforms/gl-uniform-arrays.html',
         ['chromeos', ('intel', 0xa011)], bug=375554)
     self.Skip('conformance/uniforms/uniform-default-values.html',
         ['chromeos', ('intel', 0xa011)], bug=375554)