Try to fix runhooks_wrapper.py on Windows after r263959.

build/scripts/slave/runhooks_wrapper.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 """Wrapper script for `gclient runhooks`.
 
 This is useful to set slave-dependent gyp defines.
 """
 
@@ skipping 24 matching lines @@
 
   if options.use_goma:
     # Add goma-related GYP_DEFINES if requested. This is done in a slave script
     # because goma_dir is a slave-relative path and is not known to the master.
     gyp_defines = os.environ.get('GYP_DEFINES', '')
     # pipes.quote() is necessary on Windows: http://crbug.com/340918#c7 - 11.
     gyp_defines += ' use_goma=1 gomadir=' + pipes.quote(options.goma_dir)
     os.environ['GYP_DEFINES'] = gyp_defines
     print 'Changed GYP_DEFINES to', os.environ['GYP_DEFINES']
 
-  return chromium_utils.RunCommand(['gclient', 'runhooks'])
+  return chromium_utils.RunCommand([chromium_utils.GetGClientCommand(),
+                                    'runhooks'])
 
 
 if '__main__' == __name__:
   sys.exit(main())