update obsolete code.google.com documentation links

build/common.gypi

 # 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 463 matching lines @@
       # TODO(glider): remove this flag.
       'asan_coverage%': 0,
       # Enable intra-object-overflow detection in ASan (experimental).
       'asan_field_padding%': 0,
 
       # Enable Chromium overrides of the default configurations for various
       # dynamic tools (like ASan).
       'use_sanitizer_options%': 0,
 
       # Enable building with SyzyAsan.
-      # See https://code.google.com/p/sawbuck/wiki/SyzyASanHowTo
+      # See https://github.com/google/syzygy/wiki/SyzyASanHowTo
       'syzyasan%': 0,
 
       # Enable crash reporting via Kasko.
       'kasko%': 0,
 
       # Enable hang reports in Kasko.
       'kasko_hang_reports%': 0,
 
       # Enable building with LSan (Clang's -fsanitize=leak option).
       # -fsanitize=leak only works with clang, but lsan=1 implies clang=1
@@ skipping 120 matching lines @@
       # Enable FTP support by default.
       'disable_ftp_support%': 0,
 
       # Use of precompiled headers on Windows.
       #
       # This variable may be explicitly set to 1 (enabled) or 0
       # (disabled) in ~/.gyp/include.gypi or via the GYP command line.
       # This setting will override the default.
       #
       # See
-      # http://code.google.com/p/chromium/wiki/WindowsPrecompiledHeaders
+      # https://chromium.googlesource.com/chromium/src/+/master/docs/windows_precompiled_headers.md
       # for details.
       'chromium_win_pch%': 0,
 
       # Clang stuff.
       'make_clang_dir%': 'third_party/llvm-build/Release+Asserts',
       # Set this to true when building with Clang.
-      # See http://code.google.com/p/chromium/wiki/Clang for details.
+      # See https://chromium.googlesource.com/chromium/src/+/master/docs/clang.md for details.
       # If this is set, clang is used as both host and target compiler in
       # cross-compile builds.
       'clang%': 0,
 
       # Use experimental lld linker instead of the platform's default linker.
       'use_lld%': 0,
 
       # Enable plugin installation by default.
       'enable_plugin_installation%': 1,
 
@@ skipping 5740 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }