Update existing uses of /wd4267 to use the GN config

third_party/boringssl/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 for us and everybody else depending on BoringSSL.
 config("openssl_config") {
   include_dirs = []
   include_dirs += [ "src/include" ]
   if (is_component_build) {
     defines = [ "BORINGSSL_SHARED_LIBRARY" ]
@@ skipping 34 matching lines @@
   defines = [
     "BORINGSSL_IMPLEMENTATION",
     "BORINGSSL_NO_STATIC_INITIALIZER",
   ]
   deps = []
   if (is_component_build) {
     defines += [ "BORINGSSL_SHARED_LIBRARY" ]
   }
 
   configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
+  configs += [
+    "//build/config/compiler:no_chromium_code",
+    # TODO(davidben): Fix size_t truncations in BoringSSL.
+    # https://crbug.com/429039
+    "//build/config/compiler:no_size_t_to_int_warning",
+  ]
 
   # Also gets the include dirs from :openssl_config
   include_dirs = [
     "src/include",
 
     # This is for arm_arch.h, which is needed by some asm files. Since the
     # asm files are generated and kept in a different directory, they
     # cannot use relative paths to find this file.
     "src/crypto",
   ]
 
-  if (is_win) {
-    # TODO(davidben): Fix size_t truncations in BoringSSL.
-    # https://crbug.com/429039
-    cflags += [ "/wd4267" ]
-  }
-
   if (cpu_arch == "x64") {
     if (is_mac) {
       sources += gypi_values.boringssl_mac_x86_64_sources
     } else if (is_linux || is_android) {
       sources += gypi_values.boringssl_linux_x86_64_sources
     } else if (is_win) {
       deps += [ ":boringssl_asm" ]
     } else {
       defines += [ "OPENSSL_NO_ASM" ]
     }
   } else if (cpu_arch == "x86") {
     if (is_mac) {
       sources += gypi_values.boringssl_mac_x86_sources
     } else if (is_linux || is_android) {
       sources += gypi_values.boringssl_linux_x86_sources
     } else if (is_win) {
       deps += [ ":boringssl_asm" ]
     } else {
       defines += [ "OPENSSL_NO_ASM" ]
     }
   } else if (cpu_arch == "arm") {
     sources += gypi_values.boringssl_linux_arm_sources
   } else if (cpu_arch == "arm64") {
     sources += gypi_values.boringssl_linux_aarch64_sources
   } else {
     defines += [ "OPENSSL_NO_ASM" ]
   }
 }