Keep only base/extractor.[cc|h].

test/test_bar.cc

-// Copyright 2006-2009 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-
-#include <windows.h>
-#include <tchar.h>
-
-// This file implements a tiny program that puts up a MessageBox and exits.
-// It's useful for generating test installation targets.
-int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int) {
-  MessageBox(NULL, _T("I am bar"), _T("bar"), MB_OK | MB_ICONINFORMATION);
-  return 0;
-}