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diff --git a/third_party/zlib/google/zip.h b/third_party/zlib/google/zip.h
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+// Copyright (c) 2011 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.
+
+#ifndef THIRD_PARTY_ZLIB_GOOGLE_ZIP_H_
+#define THIRD_PARTY_ZLIB_GOOGLE_ZIP_H_
+
+#include "base/callback.h"
+#include "base/files/file_path.h"
+
+namespace zip {
+
+// Zip the contents of src_dir into dest_file. src_path must be a directory.
+// An entry will *not* be created in the zip for the root folder -- children
+// of src_dir will be at the root level of the created zip. For each file in
+// src_dir, include it only if the callback |filter_cb| returns true. Otherwise
+// omit it.
+typedef base::Callback<bool(const base::FilePath&)> FilterCallback;
+bool ZipWithFilterCallback(const base::FilePath& src_dir,
+                           const base::FilePath& dest_file,
+                           const FilterCallback& filter_cb);
+
+// Convenience method for callers who don't need to set up the filter callback.
+// If |include_hidden_files| is true, files starting with "." are included.
+// Otherwise they are omitted.
+bool Zip(const base::FilePath& src_dir, const base::FilePath& dest_file,
+         bool include_hidden_files);
+
+#if defined(OS_POSIX)
+// Zips files listed in |src_relative_paths| to destination specified by file
+// descriptor |dest_fd|. The paths listed in |src_relative_paths| are relative
+// to the |src_dir| and will be used as the file names in the created zip file.
+// All source paths must be under |src_dir| in the file system hierarchy.
+bool ZipFiles(const base::FilePath& src_dir,
+              const std::vector<base::FilePath>& src_relative_paths,
+              int dest_fd);
+#endif  // defined(OS_POSIX)
+
+// Unzip the contents of zip_file into dest_dir.
+bool Unzip(const base::FilePath& zip_file, const base::FilePath& dest_dir);
+
+}  // namespace zip
+
+#endif  // THIRD_PARTY_ZLIB_GOOGLE_ZIP_H_