[counting_allocator] Chrome changes.

build/secondary/third_party/android_tools/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/rules.gni")
 
 config("cpu_features_include") {
   include_dirs = [ "$android_ndk_root/sources/android/cpufeatures" ]
 }
 
@@ skipping 271 matching lines @@
 
 android_aar_prebuilt("google_play_services_vision_java") {
   deps = [
     ":google_play_services_base_java",
     ":google_play_services_basement_java",
   ]
   _lib_name = "play-services-vision"
   aar_path = "$gms_path/$_lib_name/$gms_version/$_lib_name-$gms_version.aar"
   ignore_manifest = true
 }
+
+config("libc++_flags") {
+  defines = [ "__STDC_FORMAT_MACROS" ]
+  cflags_cc = [
+    "-fthreadsafe-statics",
+    "-Wno-#warnings", # for chrono.cpp
+    "-Wno-redundant-move", # for system_error.cpp
+  ]
+}
+
+static_library("libc++") {
+  libcxx = "$android_ndk_root/sources/cxx-stl/llvm-libc++/libcxx"
+  sources = [
+    "$libcxx/src/algorithm.cpp",
+    "$libcxx/src/bind.cpp",
+    "$libcxx/src/chrono.cpp",
+    "$libcxx/src/condition_variable.cpp",
+    "$libcxx/src/debug.cpp",
+    "$libcxx/src/exception.cpp",
+    "$libcxx/src/future.cpp",
+    "$libcxx/src/hash.cpp",
+    "$libcxx/src/ios.cpp",
+    "$libcxx/src/iostream.cpp",
+    "$libcxx/src/locale.cpp",
+    "$libcxx/src/memory.cpp",
+    "$libcxx/src/mutex.cpp",
+    "$libcxx/src/new.cpp",
+    "$libcxx/src/optional.cpp",
+    "$libcxx/src/random.cpp",
+    "$libcxx/src/regex.cpp",
+    "$libcxx/src/shared_mutex.cpp",
+    "$libcxx/src/stdexcept.cpp",
+    "$libcxx/src/string.cpp",
+    "$libcxx/src/strstream.cpp",
+    "$libcxx/src/system_error.cpp",
+    "$libcxx/src/thread.cpp",
+    "$libcxx/src/typeinfo.cpp",
+    "$libcxx/src/utility.cpp",
+    "$libcxx/src/valarray.cpp",
+    "$libcxx/src/support/android/locale_android.cpp"
+  ]
+  configs -= [
+    "//build/config/compiler:chromium_code",
+    "//build/config/compiler:no_rtti",
+    "//build/config/gcc:no_exceptions",
+    "//build/config/gcc:symbol_visibility_hidden",
+  ]
+  configs += [
+    "//build/config/compiler:no_chromium_code",
+    "//build/config/compiler:rtti",
+    "//build/config/gcc:symbol_visibility_default",
+    ":libc++_flags",
+  ]
+}