Add GN For hpack fuzzing utilities and net_perftests.

build/config/compiler/BUILD.gn

 # Copyright (c) 2013 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.
 
 import("//build/config/android/config.gni")
 if (cpu_arch == "arm") {
   import("//build/config/arm.gni")
 }
 if (cpu_arch == "mipsel" || cpu_arch == "mips64el") {
   import("//build/config/mips.gni")
@@ skipping 871 matching lines @@
 }
 
 # On Windows compiling on x64, VC will issue a warning when converting
 # size_t to int because it will truncate the value. Our code should not have
 # these warnings and one should use a static_cast or a checked_cast for the
 # conversion depending on the case. However, a lot of code still needs to be
 # fixed. Apply this config to such targets to disable the warning.
 #
 # Note that this can be applied regardless of platform and architecture to
 # clean up the call sites. This will only apply the flag when necessary.
+#
+# TODO(jschuh): crbug.com/167187 fix this and delete this config.
 config("no_size_t_to_int_warning") {
   if (is_win && cpu_arch == "x64") {
     cflags = [ "/wd4267" ]
   }
 }
 
 # Optimization -----------------------------------------------------------------
 #
 # Note that BUILDCONFIG.gn sets up a variable "default_optimization_config"
 # which it will assign to the config it implicitly applies to every target. If
@@ skipping 165 matching lines @@
       cflags += [ "-gsplit-dwarf" ]
     }
   }
 }
 
 config("no_symbols") {
   if (!is_win) {
     cflags = [ "-g0" ]
   }
 }