Prune the list of third_party symlinks

setup_links.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.
 
 """Setup links to a Chromium checkout for WebRTC.
@@ skipping 21 matching lines @@
 
 
 DIRECTORIES = [
   'build',
   'buildtools',
   'google_apis',  # Needed by build/common.gypi.
   'native_client',
   'net',
   'testing',
   'third_party/binutils',
-  'third_party/boringssl',
-  'third_party/colorama',
   'third_party/drmemory',
-  'third_party/expat',
-  'third_party/icu',
   'third_party/instrumented_libraries',
-  'third_party/jsoncpp',
   'third_party/libjpeg',
   'third_party/libjpeg_turbo',
-  'third_party/libsrtp',
-  'third_party/libudev',
-  'third_party/libvpx',
-  'third_party/libyuv',
   'third_party/llvm-build',
   'third_party/lss',
-  'third_party/nss',
-  'third_party/ocmock',
-  'third_party/openmax_dl',
-  'third_party/opus',
-  'third_party/proguard',
-  'third_party/protobuf',
-  'third_party/sqlite',
-  'third_party/syzygy',
-  'third_party/usrsctp',
   'third_party/yasm',
-  'third_party/zlib',
   'tools/clang',
-  'tools/generate_library_loader',
   'tools/gn',
   'tools/gyp',
   'tools/memory',
-  'tools/protoc_wrapper',
   'tools/python',
   'tools/swarming_client',
   'tools/valgrind',
   'tools/vim',
   'tools/win',
 ]
 
 from sync_chromium import get_target_os_list
 target_os = get_target_os_list()
 if 'android' in target_os:
   DIRECTORIES += [
     'base',
     'third_party/android_platform',
     'third_party/android_testrunner',
     'third_party/android_tools',
     'third_party/appurify-python',
     'third_party/ashmem',
     'third_party/catapult',
     'third_party/ijar',
     'third_party/jsr-305',
     'third_party/junit',
     'third_party/libevent',
     'third_party/libxml',
     'third_party/mockito',
     'third_party/modp_b64',
+    'third_party/protobuf',
     'third_party/requests',
     'third_party/robolectric',
     'tools/android',
     'tools/grit',
     'tools/relocation_packer',
     'tools/telemetry',
   ]
 if 'ios' in target_os:
   DIRECTORIES.append('third_party/class-dump')
 
@@ skipping 402 matching lines @@
   except LinkError as e:
     print >> sys.stderr, e.message
     return 3
   finally:
     links_database.close()
   return 0
 
 
 if __name__ == '__main__':
   sys.exit(main())