Minor Fixes for Windows GN build.

courgette/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.
 
 static_library("courgette_lib") {
   sources = [
     "adjustment_method.cc",
     "adjustment_method_2.cc",
     "adjustment_method.h",
     "assembly_program.cc",
@@ skipping 89 matching lines @@
     "encode_decode_unittest.cc",
     "ensemble_unittest.cc",
     "streams_unittest.cc",
     "typedrva_unittest.cc",
     "versioning_unittest.cc",
     "third_party/paged_array_unittest.cc"
   ]
 
   if (is_win) {
     # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    cflags += [ "/wd4267" ]
+    cflags = [ "/wd4267" ]
   }
 
   deps = [
     ":courgette_lib",
     "//base",
     "//base:i18n",
     "//base/allocator",
     "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//testing/gtest",
   ]
 }
 
 test("courgette_fuzz") {
   sources = [
     "base_test_unittest.cc",
     "base_test_unittest.h",
     "encoded_program_fuzz_unittest.cc",
   ]
   deps = [
     ":courgette_lib",
     "//base",
     "//base:i18n",
     "//base/test:test_support",
     "//testing/gtest",
   ]
 }