Revert of [Android] Sanitize APK signing file timestamps.

build/android/gyp/util/build_utils.py

 # Copyright 2013 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.
 
 import ast
 import contextlib
 import fnmatch
 import json
 import os
 import pipes
@@ skipping 10 matching lines @@
 import md5_check  # pylint: disable=relative-import
 
 sys.path.append(os.path.join(os.path.dirname(__file__), os.pardir, os.pardir))
 from pylib.constants import host_paths
 
 COLORAMA_ROOT = os.path.join(host_paths.DIR_SOURCE_ROOT,
                              'third_party', 'colorama', 'src')
 # aapt should ignore OWNERS files in addition the default ignore pattern.
 AAPT_IGNORE_PATTERN = ('!OWNERS:!.svn:!.git:!.ds_store:!*.scc:.*:<dir>_*:' +
                        '!CVS:!thumbs.db:!picasa.ini:!*~:!*.d.stamp')
-HERMETIC_TIMESTAMP = (2001, 1, 1, 0, 0, 0)
+_HERMETIC_TIMESTAMP = (2001, 1, 1, 0, 0, 0)
 _HERMETIC_FILE_ATTR = (0644 << 16L)
 
 
 @contextlib.contextmanager
 def TempDir():
   dirname = tempfile.mkdtemp()
   try:
     yield dirname
   finally:
     shutil.rmtree(dirname)
@@ skipping 218 matching lines @@
     zip_file: ZipFile instance to add the file to.
     zip_path: Destination path within the zip file.
     src_path: Path of the source file. Mutually exclusive with |data|.
     data: File data as a string.
     compress: Whether to enable compression. Default is take from ZipFile
         constructor.
   """
   assert (src_path is None) != (data is None), (
       '|src_path| and |data| are mutually exclusive.')
   CheckZipPath(zip_path)
-  zipinfo = zipfile.ZipInfo(filename=zip_path, date_time=HERMETIC_TIMESTAMP)
+  zipinfo = zipfile.ZipInfo(filename=zip_path, date_time=_HERMETIC_TIMESTAMP)
   zipinfo.external_attr = _HERMETIC_FILE_ATTR
 
   if src_path and os.path.islink(src_path):
     zipinfo.filename = zip_path
     zipinfo.external_attr |= stat.S_IFLNK << 16L # mark as a symlink
     zip_file.writestr(zipinfo, os.readlink(src_path))
     return
 
   if src_path:
     with file(src_path) as f:
@@ skipping 247 matching lines @@
 
   md5_check.CallAndRecordIfStale(
       on_stale_md5,
       record_path=record_path,
       input_paths=input_paths,
       input_strings=input_strings,
       output_paths=output_paths,
       force=force,
       pass_changes=True)