[string] Move String.p.toLowerCase to CSA

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.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/mips.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 
@@ skipping 901 matching lines @@
     "src/builtins/builtins-date-gen.cc",
     "src/builtins/builtins-forin-gen.cc",
     "src/builtins/builtins-forin-gen.h",
     "src/builtins/builtins-function-gen.cc",
     "src/builtins/builtins-generator-gen.cc",
     "src/builtins/builtins-global-gen.cc",
     "src/builtins/builtins-handler-gen.cc",
     "src/builtins/builtins-ic-gen.cc",
     "src/builtins/builtins-internal-gen.cc",
     "src/builtins/builtins-interpreter-gen.cc",
+    "src/builtins/builtins-intl-gen.cc",
     "src/builtins/builtins-math-gen.cc",
     "src/builtins/builtins-number-gen.cc",
     "src/builtins/builtins-object-gen.cc",
     "src/builtins/builtins-promise-gen.cc",
     "src/builtins/builtins-promise-gen.h",
     "src/builtins/builtins-regexp-gen.cc",
     "src/builtins/builtins-regexp-gen.h",
     "src/builtins/builtins-sharedarraybuffer-gen.cc",
     "src/builtins/builtins-string-gen.cc",
     "src/builtins/builtins-symbol-gen.cc",
@@ skipping 57 matching lines @@
       ### gcmole(arch:s390) ###
       "src/builtins/s390/builtins-s390.cc",
     ]
   } else if (v8_current_cpu == "x87") {
     sources += [
       ### gcmole(arch:x87) ###
       "src/builtins/x87/builtins-x87.cc",
     ]
   }
 
+  if (!v8_enable_i18n_support) {
+    sources -= [ "src/builtins/builtins-intl-gen.cc" ]
+  }
+
   configs = [ ":internal_config" ]
 }
 
 v8_source_set("v8_builtins_setup") {
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
 
   deps = [
     ":v8_builtins_generators",
   ]
 
@@ skipping 2273 matching lines @@
   ]
 
   configs = [
     ":external_config",
     ":internal_config_base",
   ]
 }
 
 v8_fuzzer("wasm_compile_fuzzer") {
 }