Allow multiprocess Dr Memory tests

tools/drmemory/scripts/pdfium_tests.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.
 
 ''' Runs various chrome tests through valgrind_test.py.'''
 
 import glob
 import logging
 import optparse
@@ skipping 278 matching lines @@
     tool = valgrind_test.CreateTool(self._options.valgrind_tool)
     cmd = self._DefaultCommand(tool)
     cmd.append("--trace_children")
     cmd.append("--indirect_pdfium_test")
     cmd.append("--ignore_exit_code")
     # Now build script_cmd, the run_corpus_tests commandline.
     script = os.path.join(self._source_dir, "testing", "tools", script_name)
     script_cmd = ["python", script]
     if self._options.build_dir:
       script_cmd.extend(["--build-dir", self._options.build_dir])
-    # TODO(zhaoqin): it only runs in single process mode now,
-    # need figure out why it does not work with test_one_file_parallel.
-    script_cmd.extend(["-j", "1"])
     # Now run script_cmd with the wrapper in cmd
     cmd.append("--")
     cmd.extend(script_cmd)
 
     ret = tool.Run(cmd, "layout", min_runtime_in_seconds=0)
     return ret
 
   def TestPDFiumJavascript(self):
     return self.TestPDFiumTest("run_javascript_tests.py")
 
@@ skipping 81 matching lines @@
 
   for t in options.test:
     tests = ChromeTests(options, args, t)
     ret = tests.Run()
     if ret: return ret
   return 0
 
 
 if __name__ == "__main__":
   sys.exit(_main())