Make gypv8sh.py compatible with ninja on Windows.

tools/gypv8sh.py

 #!/usr/bin/env python
-# Copyright (c) 2011 The Chromium Authors. All rights reserved.
+# 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.
 
 """This script is used by chrome_tests.gypi's js2webui action to maintain the
 argument lists and to generate inlinable tests.
 
 Usage:
   python tools/gypv8sh.py v8_shell mock.js test_api.js js2webui.js \
          inputfile inputrelfile cxxoutfile jsoutfile
 """
 
-try:
-  import json
-except ImportError:
-  import simplejson as json
+import json
 import optparse
 import os
 import subprocess
 import sys
 import shutil
 
+
 def main ():
   parser = optparse.OptionParser()
   parser.set_usage(
       "%prog v8_shell mock.js test_api.js js2webui.js "
       "testtype inputfile inputrelfile cxxoutfile jsoutfile")
   parser.add_option('-v', '--verbose', action='store_true')
   parser.add_option('-n', '--impotent', action='store_true',
                     help="don't execute; just print (as if verbose)")
   (opts, args) = parser.parse_args()
 
   if len(args) != 9:
     parser.error('all arguments are required.')
   (v8_shell, mock_js, test_api, js2webui, test_type,
       inputfile, inputrelfile, cxxoutfile, jsoutfile) = args
   arguments = [js2webui, inputfile, inputrelfile, cxxoutfile, test_type]
   cmd = [v8_shell, '-e', "arguments=" + json.dumps(arguments), mock_js,
          test_api, js2webui]
   if opts.verbose or opts.impotent:
     print cmd
   if not opts.impotent:
     try:
-      subprocess.check_call(cmd, stdout=open(cxxoutfile, 'w'))
+      with open(cxxoutfile, 'w') as f:
+        subprocess.check_call(cmd, stdin=subprocess.PIPE, stdout=f)
       shutil.copyfile(inputfile, jsoutfile)
     except Exception, ex:
-      print ex
-      os.remove(cxxoutfile)
-      os.remove(jsoutfile)
-      sys.exit(1)
+      if os.path.exists(cxxoutfile):
+        os.remove(cxxoutfile)
+      if os.path.exists(jsoutfile):
+        os.remove(jsoutfile)
+      raise
+
 
 if __name__ == '__main__':
  sys.exit(main())