Linux: add an option to use system minizip.

chrome/common/zip_reader.cc

 // Copyright (c) 2012 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 "chrome/common/zip_reader.h"
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/common/zip_internal.h"
 #include "net/base/file_stream.h"
+
+#if defined(USE_SYSTEM_MINIZIP)
+#include <minizip/unzip.h>
+#else
 #include "third_party/zlib/contrib/minizip/unzip.h"
 #if defined(OS_WIN)
 #include "third_party/zlib/contrib/minizip/iowin32.h"
-#endif
+#endif  // defined(OS_WIN)
+#endif  // defined(USE_SYSTEM_MINIZIP)
 
 namespace zip {
 
 // TODO(satorux): The implementation assumes that file names in zip files
 // are encoded in UTF-8. This is true for zip files created by Zip()
 // function in zip.h, but not true for user-supplied random zip files.
 ZipReader::EntryInfo::EntryInfo(const std::string& file_name_in_zip,
                                 const unz_file_info& raw_file_info)
     : file_path_(FilePath::FromUTF8Unsafe(file_name_in_zip)),
       is_directory_(false) {
@@ skipping 268 matching lines @@
 }
 
 void ZipReader::Reset() {
   zip_file_ = NULL;
   num_entries_ = 0;
   reached_end_ = false;
   current_entry_info_.reset();
 }
 
 }  // namespace zip