Brotli compression used on about credits html file.

third_party/brotli/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.
 
+if (is_win) {
+  import("//build/config/win/visual_studio_version.gni")
+}
+
 source_set("brotli") {
   sources = [
     "dec/bit_reader.c",
     "dec/bit_reader.h",
     "dec/context.h",
     "dec/decode.c",
     "dec/decode.h",
     "dec/dictionary.c",
     "dec/dictionary.h",
     "dec/huffman.c",
@@ skipping 63 matching lines @@
       "enc/types.h",
       "enc/utf8_util.cc",
       "enc/utf8_util.h",
       "enc/write_bits.h",
       "tools/bro.cc",
     ]
     deps = [
       ":brotli",
     ]
 
+    if (is_win && visual_studio_version == "2015") {
+      # Disabling "result of 32-bit shift implicitly converted to 64 bits",
+      # caused by code like: foo |= (1 << i);   // warning 4334
+      cflags = [ "/wd4334" ]
+    }
+
     # Always build release since this is a build tool.
     if (is_debug) {
       configs -= [ "//build/config:debug" ]
       configs += [ "//build/config:release" ]
     }
-    if (is_posix) {
-      configs -= [ "//build/config/gcc:no_exceptions" ]
-    } else if (is_win) {
-      cflags_cc = [ "/EHsc" ]
-    }
   }
 }