Add ScopedGeneric.

base/BUILD.gn

 # Copyright (c) 2013 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/ui.gni")
 
 component("base") {
   external = true
   sources = [
     "../build/build_config.h",
@@ skipping 453 matching lines @@
     "rand_util.cc",
     "rand_util.h",
     "rand_util_nacl.cc",
     "rand_util_posix.cc",
     "rand_util_win.cc",
     "run_loop.cc",
     "run_loop.h",
     "safe_numerics.h",
     "safe_strerror_posix.cc",
     "safe_strerror_posix.h",
+    "scoped_nullable_generic.h",
     "scoped_native_library.cc",
     "scoped_native_library.h",
     "sequence_checker.h",
     "sequence_checker_impl.cc",
     "sequence_checker_impl.h",
     "sequenced_task_runner.cc",
     "sequenced_task_runner.h",
     "sequenced_task_runner_helpers.h",
     "sha1.h",
     "sha1_portable.cc",
@@ skipping 415 matching lines @@
   #    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   #    'msvs_disabled_warnings': [
   #      4267,
   #    ],
   #  }],
   #],
   #'variables': {
   #  'optimize': 'max',
   #},
 }