[gn] Enable stricter build flags

gni/v8.gni

 # Copyright 2016 the V8 project 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/sanitizers/sanitizers.gni")
 import("//build/config/v8_target_cpu.gni")
 
 declare_args() {
   # Includes files needed for correctness fuzzing.
   v8_correctness_fuzzer = false
@@ skipping 48 matching lines @@
 # subdirectories.
 v8_path_prefix = get_path_info("../", "abspath")
 
 v8_inspector_js_protocol = v8_path_prefix + "/src/inspector/js_protocol.json"
 
 ###############################################################################
 # Templates
 #
 
 # Common configs to remove or add in all v8 targets.
-v8_remove_configs = [ "//build/config/compiler:chromium_code" ]
+v8_remove_configs = []
 v8_add_configs = [
-  "//build/config/compiler:no_chromium_code",
   v8_path_prefix + ":features",
   v8_path_prefix + ":toolchain",
 ]
 
 if (is_debug && !v8_optimized_debug) {
   v8_remove_configs += [ "//build/config/compiler:default_optimization" ]
   v8_add_configs += [ "//build/config/compiler:no_optimize" ]
 } else {
   v8_remove_configs += [ "//build/config/compiler:default_optimization" ]
 
@@ skipping 61 matching lines @@
 }
 
 template("v8_component") {
   component(target_name) {
     forward_variables_from(invoker, "*", [ "configs" ])
     configs += invoker.configs
     configs -= v8_remove_configs
     configs += v8_add_configs
   }
 }