Update from https://crrev.com/311076

tools/git/move_source_file.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.
 
 """Moves C++ files to a new location, updating any include paths that point
 to them, and re-ordering headers as needed.  If multiple source files are
 specified, the destination must be a directory.  Updates include guards in
 moved header files.  Assumes Chromium coding style.
 
@@ skipping 32 matching lines @@
 def MakeDestinationPath(from_path, to_path):
   """Given the from and to paths, return a correct destination path.
 
   The initial destination path may either a full path or a directory.
   Also does basic sanity checks.
   """
   if not IsHandledFile(from_path):
     raise Exception('Only intended to move individual source files '
                     '(%s does not have a recognized extension).' %
                     from_path)
+
+  # Remove '.', '..', etc.
+  to_path = os.path.normpath(to_path)
+
   if os.path.isdir(to_path):
     to_path = os.path.join(to_path, os.path.basename(from_path))
   else:
     dest_extension = os.path.splitext(to_path)[1]
     if dest_extension not in HANDLED_EXTENSIONS:
       raise Exception('Destination must be either a full path with '
                       'a recognized extension or a directory.')
   return to_path
 
 
@@ skipping 122 matching lines @@
       continue
     to_path = MakeDestinationPath(from_path, orig_to_path)
     if not opts.already_moved:
       MoveFile(from_path, to_path)
     UpdatePostMove(from_path, to_path)
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())