Remove intsafe_workaround.h

sdch/BUILD.gn

 # 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.
 
 config("sdch_config") {
   include_dirs = [ "open-vcdiff/src" ]
 }
 
 static_library("sdch") {
   sources = [
@@ skipping 47 matching lines @@
   # open-vcdiff's logging.h introduces static initializers. This was
   # reported upstream years ago (
   # https://code.google.com/p/open-vcdiff/issues/detail?id=33 ). Since
   # upstream won't fix this, work around it on the chromium side:
   # Inject a header that forwards to base/logging.h instead (which doesn't
   # introduce static initializers, and which prevents open-vcdiff's
   # logging.h from being used).
   logging_file = rebase_path("logging_forward.h", root_build_dir)
   if (is_win) {
     cflags = [
-      "/FI", rebase_path("//build/intsafe_workaround.h", root_build_dir),
       "/FI", logging_file,
     ]
   } else {
     cflags = [ "-include", logging_file ]
     if (is_linux) {
       # TODO(mostynb): remove this if open-vcdiff is ever updated for c++11:
       cflags += [ "-Wno-deprecated-declarations" ]
     }
   }
 }