Work around problems with very long file names on Windows.

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
+import platform
 
 from gpu_tests.gpu_test_expectations import GpuTestExpectations
 
 # See the GpuTestExpectations class for documentation.
 
 class WebGLConformanceExpectations(GpuTestExpectations):
   def __init__(self, conformance_path):
     self.conformance_path = conformance_path
     super(WebGLConformanceExpectations, self).__init__()
 
   def Fail(self, pattern, condition=None, bug=None):
     self.CheckPatternIsValid(pattern)
     GpuTestExpectations.Fail(self, pattern, condition, bug)
 
   def Skip(self, pattern, condition=None, bug=None):
     self.CheckPatternIsValid(pattern)
     GpuTestExpectations.Skip(self, pattern, condition, bug)
 
   def CheckPatternIsValid(self, pattern):
     # Look for basic wildcards.
     if not '*' in pattern:
       full_path = os.path.normpath(os.path.join(self.conformance_path, pattern))
       if not os.path.exists(full_path):
-        raise Exception('The WebGL conformance test path specified in' +
+        err_msg = ('The WebGL conformance test path specified in ' +
           'expectation does not exist: ' + full_path)
+        # Seeing problems on some Windows bots where the full path doesn't
+        # seem to exist if it's over 255 characters. http://crbug.com/599333
+        if platform.system().startswith('Windows') and len(full_path) > 255:
+          print err_msg
+        else:
+          raise Exception(err_msg)
 
   def SetExpectations(self):
     # Fails on all platforms
     self.Fail('deqp/data/gles2/shaders/functions.html',
         bug=478572)
     self.Fail('deqp/data/gles2/shaders/scoping.html',
         bug=478572)
     self.Fail('conformance/extensions/ext-sRGB.html',
         bug=540900)
 
@@ skipping 383 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)