GN build: GPU work, Windows compile, "check" errors

third_party/libwebp/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("libwebp_config") {
   include_dirs = [ "." ]
 }
 
 source_set("libwebp_dec") {
   sources = [
     "dec/alpha.c",
     "dec/buffer.c",
     "dec/frame.c",
     "dec/idec.c",
     "dec/io.c",
     "dec/layer.c",
     "dec/quant.c",
     "dec/tree.c",
     "dec/vp8.c",
     "dec/vp8l.c",
     "dec/webp.c",
   ]
+
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+
   deps = [
     ":libwebp_dsp",
 # TODO(GYP):
 #    ":libwebp_dsp_neon",
     ":libwebp_utils",
   ]
   all_dependent_configs = [
     ":libwebp_config"
   ]
 }
@@ skipping 13 matching lines @@
     "dsp/cpu.c",
     "dsp/dec.c",
     "dsp/dec_sse2.c",
     "dsp/enc.c",
     "dsp/enc_sse2.c",
     "dsp/lossless.c",
     "dsp/upsampling.c",
     "dsp/upsampling_sse2.c",
     "dsp/yuv.c",
   ]
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+
   all_dependent_configs = [
     ":libwebp_config"
   ]
   deps = []
   if (is_android) {
     deps += [ "//third_party/android_tools:cpu_features" ]
   }
 # TODO(GYP):
 #      'conditions': [
 #        ['order_profiling != 0', {
@@ skipping 47 matching lines @@
     "enc/iterator.c",
     "enc/layer.c",
     "enc/picture.c",
     "enc/quant.c",
     "enc/syntax.c",
     "enc/token.c",
     "enc/tree.c",
     "enc/vp8l.c",
     "enc/webpenc.c",
   ]
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+
   all_dependent_configs = [
     ":libwebp_config"
   ]
 }
 
 source_set("libwebp_utils") {
   sources = [
     "utils/alpha_processing.c",
     "utils/bit_reader.c",
     "utils/bit_writer.c",
     "utils/color_cache.c",
     "utils/filters.c",
     "utils/huffman.c",
     "utils/huffman_encode.c",
     "utils/quant_levels.c",
     "utils/quant_levels_dec.c",
     "utils/random.c",
     "utils/rescaler.c",
     "utils/thread.c",
     "utils/utils.c",
   ]
+  configs -= [ "//build/config/compiler:chromium_code" ]
+  configs += [ "//build/config/compiler:no_chromium_code" ]
+
   all_dependent_configs = [
     ":libwebp_config"
   ]
 }
 
 group("libwebp") {
   deps = [
     ":libwebp_dec",
     ":libwebp_demux",
     ":libwebp_dsp",
 # TODO(GYP):
 #    ":libwebp_dsp_neon",
     ":libwebp_enc",
     ":libwebp_utils",
   ]
   direct_dependent_configs = [
     ":libwebp_config"
   ]
 }