Update WebGL2 conformance 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):
     super(WebGL2ConformanceExpectations, self).__init__(conformance_path)
@@ skipping 63 matching lines @@
     self.Skip('deqp/functional/gles3/texturewrap.html', bug=483282)
     self.Skip('deqp/functional/gles3/transformfeedback.html', bug=483282)
     self.Skip('deqp/functional/gles3/uniformapi.html', bug=483282)
     self.Skip('deqp/functional/gles3/uniformbuffers.html', bug=483282)
     self.Skip('deqp/functional/gles3/vertexarrays.html', bug=483282)
 
     self.Fail('conformance2/glsl3/array-complex-indexing.html', bug=483282)
     self.Fail('conformance2/glsl3/forbidden-operators.html', bug=483282)
     self.Fail('conformance2/extensions/promoted-extensions-in-shaders.html',
         bug=295792)
-    self.Fail('conformance2/reading/read-pixels-pack-parameters.html',
+    self.Skip('conformance2/reading/read-pixels-pack-parameters.html',
         bug=483282)
     self.Fail('conformance2/samplers/sampler-drawing-test.html', bug=483282)
     self.Skip('conformance2/textures/webgl_canvas/*', bug=483282)
 
     # Windows only.
     self.Skip('deqp/functional/gles3/readpixel.html', ['win'], bug=483282)
     self.Skip('deqp/functional/gles3/texturestatequery.html',
         ['win'], bug=483282)
     self.Fail('conformance2/glsl3/array-in-complex-expression.html',
         ['win'], bug=483282)
@@ skipping 221 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'])