Remove old iossim code (pre-Xcode 8) and class-dump.

third_party/class-dump/class-dump.py

-# Copyright 2016 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 around class-dump to allow gn build to run the tool (as action
-# target can only run python scripts). Also filters the output to remove
-# all cxx_destruct lines that are not understood from class-dump output.
-
-import argparse
-import errno
-import os
-import subprocess
-import sys
-
-
-def Main(args):
-  parser = argparse.ArgumentParser('wrapper around class-dump')
-  parser.add_argument(
-      '-o', '--output', required=True,
-      help='name of the output file')
-  parser.add_argument(
-      '-t', '--class-dump-path', required=True,
-      help='path to class-dump executable')
-  parser.add_argument(
-      'args', nargs='*',
-      help='arguments to pass to class-dump')
-  args = parser.parse_args(args)
-
-  try:
-    os.makedirs(os.path.dirname(args.output))
-  except OSError, e:
-    if e.errno != errno.EEXIST:
-      raise
-
-  process = subprocess.Popen(
-      [args.class_dump_path] + args.args,
-      stdout=subprocess.PIPE,
-      stderr=subprocess.PIPE)
-  stdout, stderr = process.communicate()
-  if process.returncode != 0:
-    sys.stderr.write(stderr)
-    sys.exit(process.returncode)
-
-  with open(args.output, 'wb') as output:
-    output.write("// Treat class-dump output as a system header.\n")
-    output.write("#pragma clang system_header\n")
-    for line in stdout.splitlines():
-      if 'cxx_destruct' in line:
-        continue
-      output.write(line)
-      output.write('\n')
-
-
-if __name__ == '__main__':
-  Main(sys.argv[1:])