Implement rewrite logic for assigning a temporary scoped_refptr to T*.

tools/clang/scripts/run_tool.py

 #!/usr/bin/env python
 # Copyright (c) 2013 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.
 
 """Wrapper script to help run clang tools across Chromium code.
 
 How to use this tool:
 If you want to run the tool across all Chromium code:
 run_tool.py <tool> <path/to/compiledb>
@@ skipping 21 matching lines @@
 ==== END EDITS ====
 
 Any generated edits are applied once the clang tool has finished running
 across Chromium, regardless of whether some instances failed or not.
 """
 
 import collections
 import functools
 import multiprocessing
 import os.path
+import pipes
 import subprocess
 import sys
 
 
 Edit = collections.namedtuple(
     'Edit', ('edit_type', 'offset', 'length', 'replacement'))
 
 
 def _GetFilesFromGit(paths = None):
   """Gets the list of files in the git repository.
@@ skipping 156 matching lines @@
           continue
         last_edit = edit
         contents[edit.offset:edit.offset + edit.length] = edit.replacement
         if not edit.replacement:
           _ExtendDeletionIfElementIsInList(contents, edit.offset)
         edit_count += 1
       f.seek(0)
       f.truncate()
       f.write(contents)
     if clang_format_diff_path:
+      # TODO(dcheng): python3.3 exposes this publicly as shlex.quote, but Chrome
+      # uses python2.7. Use the deprecated interface until Chrome uses a newer
+      # Python.
       if subprocess.call('git diff -U0 %s | python %s -i -p1 -style=file ' % (
-          k, clang_format_diff_path), shell=True) != 0:
+          pipes.quote(k), clang_format_diff_path), shell=True) != 0:
         print 'clang-format failed for %s' % k
   print 'Applied %d edits to %d files' % (edit_count, len(edits))
 
 
 _WHITESPACE_BYTES = frozenset((ord('\t'), ord('\n'), ord('\r'), ord(' ')))
 
 
 def _ExtendDeletionIfElementIsInList(contents, offset):
   """Extends the range of a deletion if the deleted element was part of a list.
 
@@ skipping 65 matching lines @@
   _ApplyEdits({k : v for k, v in dispatcher.edits.iteritems()
                     if k in filenames},
               clang_format_diff_path)
   if dispatcher.failed_count != 0:
     return 2
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))