Don't add quotes for testing config feature command line flags.

tools/variations/fieldtrial_util.py

 # Copyright 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.
 
 import json
 import sys
 
 import fieldtrial_to_struct
 
 def _hex(ch):
@@ skipping 77 matching lines @@
     for feature in experiment.get('disable_features', []):
       disable_features.append(feature + '<' + study_name)
 
   if not len(studies):
     return []
   _CheckForDuplicateFeatures(enable_features, disable_features)
   args = ['--force-fieldtrials=%s' % '/'.join(studies)]
   if len(params):
     args.append('--force-fieldtrial-params=%s' % ','.join(params))
   if len(enable_features):
-    args.append('--enable-features="%s"' % ','.join(enable_features))
+    args.append('--enable-features=%s' % ','.join(enable_features))
   if len(disable_features):
-    args.append('--disable-features="%s"' % ','.join(disable_features))
+    args.append('--disable-features=%s' % ','.join(disable_features))
   return args
 
 def main():
   if len(sys.argv) < 3:
     print 'Usage: fieldtrial_util.py [config_path] [platform]'
     exit(-1)
 
   supported_platforms = ['android', 'chromeos', 'ios', 'linux', 'mac', 'win']
   if sys.argv[2] not in supported_platforms:
     print ('\'%s\' is an unknown platform. Supported platforms: %s' %
         (sys.argv[2], supported_platforms))
     exit(-1)
 
   print GenerateArgs(sys.argv[1], sys.argv[2])
 
 if __name__ == '__main__':
   main()