Fix WebRTC API framework build.

webrtc/build/ios/flatten_ios_headers

-#!/usr/bin/python
-
-#  Copyright 2016 The WebRTC project authors. All Rights Reserved.
-#
-#  Use of this source code is governed by a BSD-style license
-#  that can be found in the LICENSE file in the root of the source
-#  tree. An additional intellectual property rights grant can be found
-#  in the file PATENTS.  All contributing project authors may
-#  be found in the AUTHORS file in the root of the source tree.
-
-"""Script for flattening iOS header structure."""
-
-import optparse
-import os
-import shutil
-import sys
-
-def FlattenHeaders(lib_base_dir, framework_base_dir):
-  """Flattens iOS header file directory structure."""
-  include_dir = 'include'
-  unflattened_include_dir_path = os.path.join(lib_base_dir, include_dir)
-  flattened_include_dir_path = os.path.join(framework_base_dir, include_dir)
-
-  # Create output directories.
-  if not os.path.exists(framework_base_dir):
-    os.mkdir(framework_base_dir)
-  if not os.path.exists(flattened_include_dir_path):
-    os.mkdir(flattened_include_dir_path)
-
-  for dirpath, _, filenames in os.walk(unflattened_include_dir_path):
-    for filename in filenames:
-      current_path = os.path.join(dirpath, filename)
-      new_path = os.path.join(flattened_include_dir_path, filename)
-      shutil.copy(current_path, new_path)
-
-def Main():
-  parser = optparse.OptionParser()
-  _, args = parser.parse_args()
-  if len(args) != 2:
-    parser.error('Error: Exactly 2 arguments required.')
-  lib_base_dir = args[0]
-  framework_base_dir = args[1]
-  FlattenHeaders(lib_base_dir, framework_base_dir)
-
-if __name__ == '__main__':
-  sys.exit(Main())