update obsolete code.google.com documentation links

tools/clang/scripts/update.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """This script is used to download prebuilt clang binaries.
 
 It is also used by package.py to build the prebuilt clang binaries."""
 
 import argparse
 import distutils.spawn
 import glob
 import os
 import pipes
 import re
 import shutil
 import subprocess
 import stat
 import sys
 import tarfile
 import tempfile
 import time
 import urllib2
 import zipfile
 
 # Do NOT CHANGE this if you don't know what you're doing -- see
-# https://code.google.com/p/chromium/wiki/UpdatingClang
+# https://chromium.googlesource.com/chromium/src/+/master/docs/updating_clang.md
 # Reverting problematic clang rolls is safe, though.
 CLANG_REVISION = '255169'
 
 use_head_revision = 'LLVM_FORCE_HEAD_REVISION' in os.environ
 if use_head_revision:
   CLANG_REVISION = 'HEAD'
 
 # This is incremented when pushing a new build of Clang at the same revision.
 CLANG_SUB_REVISION=1
 
@@ skipping 333 matching lines @@
     except urllib2.URLError:
       print 'Failed to download prebuilt clang %s' % cds_file
       print 'Use --force-local-build if you want to build locally.'
       print 'Exiting.'
       return 1
 
   if args.with_android and not os.path.exists(ANDROID_NDK_DIR):
     print 'Android NDK not found at ' + ANDROID_NDK_DIR
     print 'The Android NDK is needed to build a Clang whose -fsanitize=address'
     print 'works on Android. See '
-    print 'http://code.google.com/p/chromium/wiki/AndroidBuildInstructions'
+    print 'https://www.chromium.org/developers/how-tos/android-build-instructions'
     print 'for how to install the NDK, or pass --without-android.'
     return 1
 
   MaybeDownloadHostGcc(args)
   AddCMakeToPath()
 
   DeleteChromeToolsShim()
 
   Checkout('LLVM', LLVM_REPO_URL + '/llvm/trunk', LLVM_DIR)
   Checkout('Clang', LLVM_REPO_URL + '/cfe/trunk', CLANG_DIR)
@@ skipping 426 matching lines @@
     args.force_local_build = True
     if 'OS=android' not in os.environ.get('GYP_DEFINES', ''):
       # Only build the Android ASan rt on ToT bots when targetting Android.
       args.with_android = False
 
   return UpdateClang(args)
 
 
 if __name__ == '__main__':
   sys.exit(main())