DEPS: Remove migration scripts and use hooks_os.

check_root_dir.py

-#!/usr/bin/env python
-# Copyright (c) 2014 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.
-
-"""Checks for legacy root directory and instructs the user how to upgrade."""
-
-import os
-import sys
-
-SOLUTION_ROOT_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)),
-                                 os.pardir)
-MESSAGE = """\
-@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-                      A C T I O N     R E Q I R E D
-@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
-
-It looks like you have a legacy checkout where the solution's top-level
-directory is named 'trunk'. From now on, it must be named 'src'.
-
-What you need to do is to:
-
-1. Edit your .gclient file and change the solution name from 'trunk' to 'src'
-2. Rename your 'trunk' directory to 'src'
-3. Re-run gclient sync (or gclient runhooks)"""
-
-
-def main():
-  gclient_filename = os.path.join(SOLUTION_ROOT_DIR, '.gclient')
-  config_dict = {}
-  try:
-    with open(gclient_filename, 'rb') as gclient_file:
-      exec(gclient_file, config_dict)
-    for solution in config_dict.get('solutions', []):
-      if solution['name'] == 'trunk':
-        print MESSAGE
-        if solution.get('custom_vars', {}).get('root_dir'):
-          print ('4. Optional: Remove your "root_dir" entry from the '
-                 'custom_vars dictionary of the solution.')
-
-        # Remove the gclient cache file to avoid an error on the next sync.
-        entries_file = os.path.join(SOLUTION_ROOT_DIR, '.gclient_entries')
-        if os.path.exists(entries_file):
-          os.unlink(entries_file)
-        return 1
-    return 0
-  except Exception as e:
-    print >> sys.stderr, "Error while parsing .gclient: ", e
-    return 1
-
-
-if __name__ == '__main__':
-  sys.exit(main())