Suppress flaky failure of conformance_extensions_oes_texture_float_with_video.

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 182 matching lines @@
     # Mac Retina NVIDIA failures
     self.Fail(
         'conformance/glsl/bugs/array-of-struct-with-int-first-position.html',
         ['mac', ('nvidia', 0xfd5), ('nvidia', 0xfe9)], bug=368912)
     self.Fail('conformance/textures/image_bitmap_from_image/*',
         ['mac', ('nvidia', 0xfd5), ('nvidia', 0xfe9)], bug=589930)
     self.Fail('conformance/extensions/webgl-draw-buffers.html',
         ['mavericks', ('nvidia', 0xfe9)], bug=586536)
 
     # Mac Retina AMD failures
+    self.Flaky('conformance/extensions/oes-texture-float-with-video.html',
+        ['mac', ('amd', 0x6821)], bug=599272)
     self.Fail('conformance/textures/image_bitmap_from_image/*',
         ['mac', ('amd', 0x6821)], bug=589930)
 
     # Mac AMD failures
     self.Fail('conformance/textures/image_bitmap_from_image/' +
         'tex-2d-rgb-rgb-unsigned_byte.html',
         ['mac', ('amd', 0x679e)], bug=589930)
     self.Fail('conformance/textures/image_bitmap_from_image/' +
         'tex-2d-rgba-rgba-unsigned_byte.html',
         ['mac', ('amd', 0x679e)], bug=589930)
@@ skipping 272 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)