unbundle: remove obsolete GYP script

BUG=none
R=dpranke@chromium.org

Review URL: https://codereview.chromium.org/2343883002 .

Cr-Commit-Position: refs/heads/master@{#418987}

build/linux/unbundle/README

@@ -37,19 +37,6 @@ Usage:
    NOTE: by default this will not remove anything (for safety). Pass
    --do-remove flag to actually remove files.
 
-2. Pick the script to run depending on whether you use GYP or GN:
+2. replace_gn_files.py --system-libraries lib...
 
-2a. replace_gyp_files.py <gyp-flags>
-
-    For example: replace_gyp_files.py -Duse_system_harfbuzz=1
-
-    The script ignores flags other than -D for convenience. This makes it
-    possible to have a variable e.g. ${myconf} with all the options, and
-    execute:
-
-    build/linux/unbundle/replace_gyp_files.py ${myconf}
-    build/gyp_chromium ${myconf}
-
-2b. replace_gn_files.py --system-libraries lib...
-
-    For example: replace_gn_files.py --system-libraries libxml
+   For example: replace_gn_files.py --system-libraries libxml

build/linux/unbundle/replace_gyp_files.py

-#!/usr/bin/env python
-# 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.
-
-"""
-Replaces gyp files in tree with files from here that
-make the build use system libraries.
-"""
-
-
-import optparse
-import os.path
-import shutil
-import sys
-
-
-REPLACEMENTS = {
-  'use_system_expat': 'third_party/expat/expat.gyp',
-  'use_system_ffmpeg': 'third_party/ffmpeg/ffmpeg.gyp',
-  'use_system_flac': 'third_party/flac/flac.gyp',
-  'use_system_harfbuzz': 'third_party/harfbuzz-ng/harfbuzz.gyp',
-  'use_system_icu': 'third_party/icu/icu.gyp',
-  'use_system_jsoncpp': 'third_party/jsoncpp/jsoncpp.gyp',
-  'use_system_libevent': 'base/third_party/libevent/libevent.gyp',
-  'use_system_libjpeg': 'third_party/libjpeg/libjpeg.gyp',
-  'use_system_libpng': 'third_party/libpng/libpng.gyp',
-  'use_system_libusb': 'third_party/libusb/libusb.gyp',
-  'use_system_libvpx': 'third_party/libvpx/libvpx.gyp',
-  'use_system_libwebp': 'third_party/libwebp/libwebp.gyp',
-  'use_system_libxml': 'third_party/libxml/libxml.gyp',
-  'use_system_libxnvctrl' : 'third_party/libXNVCtrl/libXNVCtrl.gyp',
-  'use_system_libxslt': 'third_party/libxslt/libxslt.gyp',
-  'use_system_opus': 'third_party/opus/opus.gyp',
-  'use_system_protobuf': 'third_party/protobuf/protobuf.gyp',
-  'use_system_re2': 'third_party/re2/re2.gyp',
-  'use_system_snappy': 'third_party/snappy/snappy.gyp',
-  'use_system_sqlite': 'third_party/sqlite/sqlite.gyp',
-  'use_system_v8': 'v8/src/v8.gyp',
-  'use_system_zlib': 'third_party/zlib/zlib.gyp',
-}
-
-
-def DoMain(argv):
-  my_dirname = os.path.dirname(__file__)
-  source_tree_root = os.path.abspath(
-    os.path.join(my_dirname, '..', '..', '..'))
-
-  parser = optparse.OptionParser()
-
-  # Accept arguments in gyp command-line syntax, so that the caller can re-use
-  # command-line for this script and gyp.
-  parser.add_option('-D', dest='defines', action='append')
-
-  parser.add_option('--undo', action='store_true')
-
-  options, args = parser.parse_args(argv)
-
-  for flag, path in REPLACEMENTS.items():
-    if '%s=1' % flag not in options.defines:
-      continue
-
-    if options.undo:
-      # Restore original file, and also remove the backup.
-      # This is meant to restore the source tree to its original state.
-      os.rename(os.path.join(source_tree_root, path + '.orig'),
-                os.path.join(source_tree_root, path))
-    else:
-      # Create a backup copy for --undo.
-      shutil.copyfile(os.path.join(source_tree_root, path),
-                      os.path.join(source_tree_root, path + '.orig'))
-
-      # Copy the gyp file from directory of this script to target path.
-      shutil.copyfile(os.path.join(my_dirname, os.path.basename(path)),
-                      os.path.join(source_tree_root, path))
-
-  return 0
-
-
-if __name__ == '__main__':
-  sys.exit(DoMain(sys.argv))