Add msvs version option to gyptest.

gyptest.py

 #!/usr/bin/env python
 
 # Copyright (c) 2012 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 __doc__ = """
 gyptest.py -- test runner for GYP tests.
 """
 
@@ skipping 135 matching lines @@
     argv = sys.argv
 
   usage = "gyptest.py [-ahlnq] [-f formats] [test ...]"
   parser = optparse.OptionParser(usage=usage)
   parser.add_option("-a", "--all", action="store_true",
             help="run all tests")
   parser.add_option("-C", "--chdir", action="store", default=None,
             help="chdir to the specified directory")
   parser.add_option("-f", "--format", action="store", default='',
             help="run tests with the specified formats")
+  parser.add_option("-G", '--gyp_option', action="append", default=[],
+            help="Add -G options to the gyp command line")
   parser.add_option("-l", "--list", action="store_true",
             help="list available tests and exit")
   parser.add_option("-n", "--no-exec", action="store_true",
             help="no execute, just print the command line")
   parser.add_option("--passed", action="store_true",
             help="report passed tests")
   parser.add_option("--path", action="append", default=[],
             help="additional $PATH directory")
   parser.add_option("-q", "--quiet", action="store_true",
             help="quiet, don't print test command lines")
@@ skipping 47 matching lines @@
       'linux2':   ['make', 'ninja'],
       'linux3':   ['make', 'ninja'],
       'darwin':   ['make', 'ninja', 'xcode'],
     }[sys.platform]
 
   for format in format_list:
     os.environ['TESTGYP_FORMAT'] = format
     if not opts.quiet:
       sys.stdout.write('TESTGYP_FORMAT=%s\n' % format)
 
+    gyp_options = []
+    for option in opts.gyp_option:
+      gyp_options += ['-G', option]
+    if gyp_options and not opts.quiet:
+      sys.stdout.write('Extra Gyp options: %s\n' % gyp_options)
+
     for test in tests:
-      status = cr.run([sys.executable, test],
+      status = cr.run([sys.executable, test] + gyp_options,
                       stdout=sys.stdout,
                       stderr=sys.stderr)
       if status == 2:
         no_result.append(test)
       elif status:
         failed.append(test)
       else:
         passed.append(test)
 
   if not opts.quiet:
@@ skipping 12 matching lines @@
     report("No result from", no_result)
 
   if failed:
     return 1
   else:
     return 0
 
 
 if __name__ == "__main__":
   sys.exit(main())