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

tools/ReadTag/read_tag.cc

-// Copyright 2007-2009 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.
-// ========================================================================
-//
-// Simple tool to read the stamped tag inside a binary.
-
-#include <Windows.h>
-#include <stdio.h>
-#include "base/scoped_ptr.h"
-#include "omaha/common/file.h"
-#include "omaha/common/extractor.h"
-
-int _tmain(int argc, TCHAR* argv[]) {
-  if (argc != 2) {
-    _tprintf(_T("Incorrect number of arguments!\n"));
-    _tprintf(_T("Usage: ReadTag <tagged_file>\n"));
-    return -1;
-  }
-
-  const TCHAR* file = argv[1];
-  if (!omaha::File::Exists(file)) {
-    _tprintf(_T("File \"%s\" not found"), file);
-    return -1;
-  }
-
-  omaha::TagExtractor ext;
-  if (!ext.OpenFile(file)) {
-    _tprintf(_T("Could not open file \"%s\""), file);
-    return -1;
-  }
-
-  int len = 0;
-  if (!ext.ExtractTag(NULL, &len)) {
-    _tprintf(_T("Extract tag failed."));
-    return -1;
-  }
-
-  scoped_array<char> buffer(new char[len]);
-  if (!ext.ExtractTag(buffer.get(), &len)) {
-    _tprintf(_T("Extract tag failed."));
-    return -1;
-  }
-
-  printf("Tag = '%s'", buffer);
-  return 0;
-}