Make mojob.py test succeed on Windows.

mojo/tools/test_runner.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.
 
 """A "smart" test runner for gtest unit tests (that caches successes)."""
 
 import logging
 import os
+import platform
 import subprocess
 import sys
 
 _logging = logging.getLogger()
 
 from mopy.transitive_hash import transitive_hash
 
 def main(argv):
   logging.basicConfig()
   # Uncomment to debug:
@@ skipping 44 matching lines @@
   successes_cache_file = open(successes_cache_filename, 'ab') \
       if successes_cache_filename else None
   for gtest in gtest_list:
     if gtest[0] == '*':
       gtest = gtest[1:]
       _logging.debug("%s is marked as non-cacheable" % gtest)
       cacheable = False
     else:
       cacheable = True
 
+    if platform.system() == 'Windows':
+      gtest += ".exe"
+
     if successes_cache_file and cacheable:
       _logging.debug("Getting transitive hash for %s ... " % gtest)
       try:
         gtest_hash = transitive_hash(gtest)
       except subprocess.CalledProcessError:
         print "Failed to get transitive hash for %s" % gtest
         return 1
       _logging.debug("  Transitive hash: %s" % gtest_hash)
 
       if gtest_hash in successes:
@@ skipping 20 matching lines @@
       print "  Failed to start test"
       return 1
   print "All tests succeeded"
   if successes_cache_file:
     successes_cache_file.close()
 
   return 0
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))