sas.dll is not included to Windows 8 SDK. Use one from from Windows 7 SDK instead.

remoting/candle_and_light.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """Run 'candle' and 'light' to transform .wxs to .msi."""
 
 from optparse import OptionParser
 import os
 import subprocess
 import sys
 
 def run(command, filter=None):
   popen = subprocess.Popen(
       command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
   out, _ = popen.communicate()
   for line in out.splitlines():
     if filter and line.strip() != filter:
       print line
   return popen.returncode
 
 def main():
   parser = OptionParser()
   parser.add_option('--wix_path', dest='wix_path')
   parser.add_option('--version', dest='version')
   parser.add_option('--product_dir', dest='product_dir')
   parser.add_option('--intermediate_dir', dest='intermediate_dir')
-  parser.add_option('--platformsdk_path', dest='platformsdk_path')
+  parser.add_option('--sas_dll_path', dest='sas_dll_path')
   parser.add_option('-d', dest='define_list', action='append')
   parser.add_option('--input', dest='input')
   parser.add_option('--output', dest='output')
   options, args = parser.parse_args()
   if args:
     parser.error("no positional arguments expected")
   parameters = dict(options.__dict__)
 
   parameters['basename'] = os.path.splitext(os.path.basename(options.input))[0]
   parameters['defines'] = '-d' + ' -d'.join(parameters['define_list'])
 
   common = (
       '-nologo '
       '-ext %(wix_path)s\\WixFirewallExtension.dll '
       '-ext %(wix_path)s\\WixUIExtension.dll '
       '-ext %(wix_path)s\\WixUtilExtension.dll '
       '-dVersion=%(version)s '
       '-dFileSource=%(product_dir)s '
       '-dIconPath=resources/chromoting.ico '
-      '-dSasDllPath=%(platformsdk_path)s/redist/x86/sas.dll '
+      '-dSasDllPath=%(sas_dll_path)s/sas.dll '
       '%(defines)s '
       )
 
   candle_template = ('%(wix_path)s\\candle ' +
                     common +
                     '-out %(intermediate_dir)s/%(basename)s.wixobj ' +
                     '%(input)s ')
   rc = run(candle_template % parameters, os.path.basename(parameters['input']))
   if rc:
     return rc
 
   light_template = ('%(wix_path)s\\light ' +
                     common +
                     '-cultures:en-us ' +
                     '-sw1076 ' +
                     '-out %(output)s ' +
                     '%(intermediate_dir)s/%(basename)s.wixobj ')
   rc = run(light_template % parameters)
   if rc:
     return rc
 
   return 0
 
 if __name__ == "__main__":
   sys.exit(main())