Disable skia_warnings_as_errors for Fast bot.

tools/buildbot_spec.py

 #
 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 
 #!/usr/bin/env python
 
 usage = '''
@@ skipping 62 matching lines @@
   # skia_warnings_as_errors.
   werr = False
   if builder_dict['role'] == builder_name_schema.BUILDER_ROLE_BUILD:
     if 'Win' in builder_dict.get('os', ''):
       if not ('GDI' in builder_dict.get('extra_config', '') or
               'Exceptions' in builder_dict.get('extra_config', '')):
         werr = True
     elif ('Mac' in builder_dict.get('os', '') and
           'Android' in builder_dict.get('extra_config', '')):
       werr = False
+    elif 'Fast' in builder_dict.get('extra_config', ''):
+      # See https://bugs.chromium.org/p/skia/issues/detail?id=5257
+      werr = False
     else:
       werr = True
   gyp_defs['skia_warnings_as_errors'] = str(int(werr))  # True/False -> '1'/'0'
 
   # Win debugger.
   if 'Win' in builder_dict.get('os', ''):
     gyp_defs['skia_win_debuggers_path'] = 'c:/DbgHelp'
 
   # Qt SDK (Win).
   if 'Win' in builder_dict.get('os', ''):
@@ skipping 308 matching lines @@
   if len(sys.argv) == 2 and sys.argv[1] == 'test':
     self_test()
     sys.exit(0)
 
   if len(sys.argv) != 3:
     print usage
     sys.exit(1)
 
   with open(sys.argv[1], 'w') as out:
     json.dump(get_builder_spec(sys.argv[2]), out)