Follow-up fix: use /bin/bash instead of /bin/sh for the browser wrapper

tools/valgrind/valgrind_test.py

 #!/usr/bin/python
 # Copyright (c) 2011 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.
 
 # valgrind_test.py
 
 """Runs an exe through Valgrind and puts the intermediate files in a
 directory.
 """
@@ skipping 378 matching lines @@
     Returns the path to the wrapper. It's up to the caller to use the wrapper
     appropriately.
     """
     command = " ".join(proc)
     command = command.replace("%p", "$$.%p")
 
     (fd, indirect_fname) = tempfile.mkstemp(dir=self.log_dir,
                                             prefix="browser_wrapper.",
                                             text=True)
     f = os.fdopen(fd, "w")
-    f.write("#!/bin/sh\n")
+    f.write("#!/bin/bash\n")
     f.write('echo "Started Valgrind wrapper for this test, PID=$$"\n\n')
     f.write('for arg in $@\ndo\n')
     f.write('  if [[ "$arg" =~ --test-name=(.*) ]]\n then\n')
     f.write('    TESTCASE=${BASH_REMATCH[1]}\n')
     f.write('    echo $TESTCASE >`dirname $0`/testcase.$$.name\n')
     f.write('  fi\ndone\n')
     # Add the PID of the browser wrapper to the logfile names so we can
     # separate log files for different UI tests at the analyze stage.
     f.write(command)
     f.write(' "$@"\n')
@@ skipping 706 matching lines @@
       platform_name = sys.platform + "(Unknown)"
     raise RuntimeError, "Unknown tool (tool=%s, platform=%s)" % (tool_name,
                                                                  platform_name)
 
 def CreateTool(tool):
   return ToolFactory().Create(tool)
 
 if __name__ == '__main__':
   logging.error(sys.argv[0] + " can not be run from command line")
   sys.exit(1)