Revert 214254 "Add initial prototype for the GN meta-buildsystem."

trunk/src/tools/gn/config_values_extractors.cc

-// 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.
-
-#include "tools/gn/config_values_extractors.h"
-
-namespace {
-
-struct StringWriter {
-  void operator()(const std::string& s, std::ostream& out) const {
-    out << " " << s;
-  }
-};
-
-}  // namespace
-
-void RecursiveTargetConfigStringsToStream(
-    const Target* target,
-    const std::vector<std::string>& (ConfigValues::* getter)() const,
-    std::ostream& out) {
-  RecursiveTargetConfigToStream(target, getter, StringWriter(), out);
-}