Remove a webgl 2 conformance test from flaky list.

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 400 matching lines @@
 
     # Linux only.
     self.Fail('deqp/data/gles3/shaders/functions.html',
         ['linux'], bug=483282)
     self.Fail('conformance2/glsl3/vector-dynamic-indexing.html',
         ['linux'], bug=483282)
     self.Fail('conformance2/reading/read-pixels-from-fbo-test.html',
         ['linux'], bug=483282)
     self.Fail('conformance2/rendering/draw-buffers.html',
         ['linux'], bug=483282)
-    # Flaky because the virtual gl contexts implementation calls glUseProgram
-    # while a transform feedback is active.
-    self.Flaky('deqp/functional/gles3/negativeshaderapi.html',
-        ['linux'], bug=483282)
 
     self.Skip('deqp/data/gles3/shaders/qualification_order.html',
         ['linux', 'amd', 'intel'], bug=483282)
     self.Fail('deqp/functional/gles3/clipping.html',
         ['linux', 'amd', 'intel'], bug=483282)
 
     # Linux NVIDIA only.
     self.Fail('conformance2/glsl3/array-complex-indexing.html',
         ['linux', 'nvidia'], bug=606498)
     self.Fail('deqp/functional/gles3/fbostatequery.html',
@@ skipping 113 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'])