Revert of [test] Fix cctest path separators on Windows

test/mozilla/testcfg.py

 # Copyright 2008 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 63 matching lines @@
       for dirname, dirs, files in os.walk(current_root):
         for dotted in [x for x in dirs if x.startswith(".")]:
           dirs.remove(dotted)
         for excluded in EXCLUDED:
           if excluded in dirs:
             dirs.remove(excluded)
         dirs.sort()
         files.sort()
         for filename in files:
           if filename.endswith(".js") and not filename in FRAMEWORK:
-            fullpath = os.path.join(dirname, filename)
-            relpath = fullpath[len(self.testroot) + 1 : -3]
-            testname = relpath.replace(os.path.sep, "/")
+            testname = os.path.join(dirname[len(self.testroot) + 1:],
+                                    filename[:-3])
             case = testcase.TestCase(self, testname)
             tests.append(case)
     return tests
 
   def GetFlagsForTestCase(self, testcase, context):
     result = []
     result += context.mode_flags
     result += ["--expose-gc"]
     result += [os.path.join(self.root, "mozilla-shell-emulation.js")]
     testfilename = testcase.path + ".js"
@@ skipping 61 matching lines @@
     shutil.rmtree("mozilla")
     with tarfile.open(archive_file, "w:gz") as tar:
       tar.add("data")
     with open(versionfile, "w") as f:
       f.write(MOZILLA_VERSION)
     os.chdir(old_cwd)
 
 
 def GetSuite(name, root):
   return MozillaTestSuite(name, root)