[Cronet] Remove cronet_licenses.py replaced by common //tools/licenses.py.

Bug: 710801
Cq-Include-Trybots: master.tryserver.chromium.android:android_cronet_tester
Change-Id: I147c082f7ac74ad2bd2843b9c7ca789bac2cec7b
Reviewed-on: https://chromium-review.googlesource.com/579955Reviewed-by: Helen Li <xunjieli@chromium.org>
Commit-Queue: Misha Efimov <mef@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488420}

components/cronet/tools/cronet_licenses.py

-#!/usr/bin/python
-# Copyright 2014 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.
-
-"""Generates the contents of an Cronet LICENSE file for the third-party code.
-
-It makes use of src/tools/licenses.py and the README.chromium files on which
-it depends. Based on android_webview/tools/webview_licenses.py.
-"""
-
-import optparse
-import os
-import shutil
-import subprocess
-import sys
-import tempfile
-import textwrap
-
-REPOSITORY_ROOT = os.path.abspath(os.path.join(
-    os.path.dirname(__file__), '..', '..', '..'))
-
-sys.path.append(os.path.join(REPOSITORY_ROOT, 'tools'))
-import licenses
-
-third_party_dirs = [
-  'base/third_party/libevent',
-  'third_party/ashmem',
-  'third_party/boringssl',
-  'third_party/modp_b64',
-  'third_party/zlib',
-]
-
-
-def _ReadFile(path):
-  """Reads a file from disk.
-  Args:
-    path: The path of the file to read, relative to the root of the repository.
-  Returns:
-    The contents of the file as a string.
-  """
-  return open(os.path.join(REPOSITORY_ROOT, path), 'rb').read()
-
-
-def GenerateLicense():
-  """Generates the contents of an Cronet LICENSE file for the third-party code.
-  Returns:
-    The contents of the LICENSE file.
-  """
-  # Start with Chromium's LICENSE file
-  content = [_ReadFile('LICENSE')]
-
-  # Add necessary third_party.
-  for directory in sorted(third_party_dirs):
-    metadata = licenses.ParseDir(directory, REPOSITORY_ROOT,
-                                 require_license_file=True)
-    content.append('-' * 20)
-    content.append(directory.split("/")[-1])
-    content.append('-' * 20)
-    license_file = metadata['License File']
-    if license_file and license_file != licenses.NOT_SHIPPED:
-      content.append(_ReadFile(license_file))
-
-  return '\n'.join(content)
-
-
-def FindThirdPartyDeps(gn_path, gn_out_dir):
-  # Generate gn project in temp directory and use it to find dependencies.
-  # Current gn directory cannot ba used because gn doesn't allow recursive
-  # invocations due to potential side effects.
-  try:
-    tmp_dir = tempfile.mkdtemp(dir = gn_out_dir)
-    shutil.copy(gn_out_dir + "/args.gn", tmp_dir)
-    subprocess.check_output([gn_path, "gen", tmp_dir])
-    gn_deps = subprocess.check_output([gn_path, "desc", tmp_dir,
-                                    "//net", "deps", "--as=buildfile", "--all"])
-  finally:
-    if os.path.exists(tmp_dir):
-      shutil.rmtree(tmp_dir)
-
-  third_party_deps = []
-  for build_dep in gn_deps.split():
-    if ("third_party" in build_dep and build_dep.endswith("/BUILD.gn")):
-      third_party_deps.append(build_dep.replace("/BUILD.gn", ""))
-  third_party_deps.sort()
-  return third_party_deps
-
-
-def main():
-  class FormatterWithNewLines(optparse.IndentedHelpFormatter):
-    def format_description(self, description):
-      paras = description.split('\n')
-      formatted_paras = [textwrap.fill(para, self.width) for para in paras]
-      return '\n'.join(formatted_paras) + '\n'
-
-  parser = optparse.OptionParser(formatter=FormatterWithNewLines(),
-                                 usage='%prog command [options]')
-  parser.add_option('--gn', help='Use gn deps to find third party dependencies',
-                    action='store_true')
-  parser.add_option('--gn-path', default='gn',
-                    help='Path to gn executable (default: %(default)s)')
-  parser.description = (__doc__ +
-                       '\nCommands:\n' \
-                       '  license [filename]\n' \
-                       '    Generate Cronet LICENSE to filename or stdout.\n')
-  (flags, args) = parser.parse_args()
-
-  if flags.gn:
-    global third_party_dirs
-    third_party_dirs = FindThirdPartyDeps(flags.gn_path, os.getcwd())
-
-  if not args:
-    parser.print_help()
-    return 1
-
-  if args[0] == 'license':
-    if len(args) > 1:
-      f = open(args[1], "w")
-      try:
-        f.write(GenerateLicense())
-      finally:
-        f.close()
-    else:
-      print GenerateLicense()
-    return 0
-
-  parser.print_help()
-  return 1
-
-
-if __name__ == '__main__':
-  sys.exit(main())