[Android] Remove the workaround code of a platform bug.

From our UMA and operation feedbacks, we don't see such issue anymore.
(We notified the manufactor of the issue and likely they addressed it
in OTA). The cleanup restores native library name to libchrome.so
instead of libchrome.<VER>.so.

BUG=311644

Review URL: https://codereview.chromium.org/759833002

Cr-Original-Commit-Position: refs/heads/master@{#305925}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: d9201758ca9e6dc47e36026a4029dae5cc69e4c4

android/gyp/delete_files.py

@@ -1,53 +0,0 @@
-#!/usr/bin/env 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.
-
-"""Delete files in directories matching a pattern.
-"""
-
-import glob
-import optparse
-import os
-import sys
-
-from util import build_utils
-
-def main():
-  parser = optparse.OptionParser()
-  parser.add_option(
-      '--pattern',
-      help='Pattern for matching Files to delete.')
-  parser.add_option(
-      '--keep',
-      help='Files to keep even if they matches the pattern.')
-  parser.add_option(
-      '--stamp',
-      help='Path to touch on success')
-
-  options, args = parser.parse_args()
-
-  if not options.pattern or not args:
-    print 'No --pattern or target directories given'
-    return
-
-  for target_dir in args:
-    target_pattern = os.path.join(target_dir, options.pattern)
-    matching_files = glob.glob(target_pattern)
-
-    keep_pattern = os.path.join(target_dir, options.keep)
-    files_to_keep = glob.glob(keep_pattern)
-
-    for target_file in matching_files:
-      if target_file in files_to_keep:
-        continue
-
-      if os.path.isfile(target_file):
-        os.remove(target_file)
-
-  if options.stamp:
-    build_utils.Touch(options.stamp)
-
-if __name__ == '__main__':
-  sys.exit(main())
-

util/version.gypi

@@ -14,8 +14,6 @@
     'lastchange_path': '<(lastchange_path)',
     'version_full':
         '<!(python <(version_py_path) -f <(version_path) -t "@MAJOR@.@MINOR@.@BUILD@.@PATCH@")',
-    'version_libchrome_short':
-        '<!(python <(version_py_path) -f <(version_path) -t "@BUILD@.@PATCH@")',
     'version_mac_dylib':
         '<!(python <(version_py_path) -f <(version_path) -t "@BUILD@.@PATCH_HI@.@PATCH_LO@" -e "PATCH_HI=int(PATCH)/256" -e "PATCH_LO=int(PATCH)%256")',
   },  # variables