Generate correct error from WEBGL_draw_buffers extension.

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 20 matching lines @@
   def SetExpectations(self):
     # Fails on all platforms
     self.Fail('deqp/data/gles2/shaders/functions.html',
         bug=478572)
     self.Fail('deqp/data/gles2/shaders/preprocessor.html',
         bug=478572)
     self.Fail('deqp/data/gles2/shaders/scoping.html',
         bug=478572)
     self.Fail('conformance/extensions/ext-sRGB.html',
         bug=540900)
-    self.Fail('conformance/extensions/webgl-draw-buffers.html',
-        bug=559359)
     self.Fail('conformance/textures/misc/cube-incomplete-fbo.html',
         bug=559362)
 
     # Win failures
     self.Fail('conformance/glsl/bugs/' +
               '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)
     self.Fail('conformance/glsl/constructors/' +
@@ skipping 428 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)