Update test expectations.

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

 # Copyright (c) 2015 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.
 from gpu_tests.webgl_conformance_expectations import WebGLConformanceExpectations
 
 # See the GpuTestExpectations class for documentation.
 
 class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
   def __init__(self, conformance_path, url_prefixes=None):
     super(WebGL2ConformanceExpectations, self).__init__(
@@ skipping 46 matching lines @@
     # All platforms.
     self.Fail('conformance/glsl/bugs/samplers-in-ternary-operator.html',
         bug=657853)
     self.Fail('conformance2/textures/misc/tex-image-with-bad-args.html',
         bug=656889)
     self.Fail('conformance2/context/methods-2.html', bug=616554)
     self.Flaky('conformance2/query/occlusion-query.html', bug=603168)
 
     # Windows only.
     # We are awesome!
-    self.Fail('deqp/functional/gles3/pixelbufferobject.html',
-        ['win'], bug=1555) # ANGLE bug.
 
     # Win / NVidia
     self.Flaky('deqp/functional/gles3/fbomultisample*',
         ['win', 'nvidia'], bug=631317)
 
     # This should be fixed in the latest driver.
     self.Fail('deqp/functional/gles3/fboinvalidate/sub.html',
         ['win', 'nvidia'], bug=1246) # ANGLE bug.
 
     # Win / AMD
@@ skipping 810 matching lines @@
     # self.Fail(page_name,
     #     ['linux', ('nvidia', 0x1), 'debug', 'opengl'])
     # self.Fail(page_name,
     #     ['win', ('nvidia', 0x1), 'debug', 'opengl'])
 
     # Conflicts if between a generic os condition and a specific version
     # self.Fail(page_name,
     #     ['xp', ('nvidia', 0x1), 'debug', 'opengl'])
     # self.Fail(page_name,
     #     ['win', ('nvidia', 0x1), 'debug', 'opengl'])