[WIP NOT FOR COMMIT] Switch Android to libc++

build/config/android/config.gni

 # 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.
 
 # This file contains common system config stuff for the Android build.
 
 if (is_android) {
   has_chrome_android_internal = exec_script("//build/dir_exists.py",
           [ rebase_path("//clank", root_build_dir) ],
           "string") == "True"
@@ skipping 127 matching lines @@
       "$android_toolchain_root/lib/gcc/mipsel-linux-android/${_android_toolchain_version}/libgcc.a"
   } else {
     assert(false, "Need android libgcc support for your target arch.")
   }
 
   android_tool_prefix = "$android_toolchain_root/bin/$_binary_prefix-"
   android_readelf = "${android_tool_prefix}readelf"
   android_objcopy = "${android_tool_prefix}objcopy"
   android_gdbserver = "$android_ndk_root/prebuilt/$android_prebuilt_arch/gdbserver/gdbserver"
 
-  # stlport stuff --------------------------------------------------------------
+  # Libc++ stuff ---------------------------------------------------------------
 
   if (component_mode == "shared_library") {
-    android_stlport_library = "stlport_shared"
+    android_libcpp_library = "c++_shared"
   } else {
-    android_stlport_library = "stlport_static"
+    android_libcpp_library = "c++_static"
   }
 } else {
   if (!defined(is_android_webview_build)) {
     is_android_webview_build = false
   }
 }