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diff --git a/src/google/protobuf/io/gzip_stream.h b/src/google/protobuf/io/gzip_stream.h
deleted file mode 100644
index 15b02fe3..00000000
--- a/src/google/protobuf/io/gzip_stream.h
+++ /dev/null
@@ -1,209 +0,0 @@
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Author: brianolson@google.com (Brian Olson)
-//
-// This file contains the definition for classes GzipInputStream and
-// GzipOutputStream.
-//
-// GzipInputStream decompresses data from an underlying
-// ZeroCopyInputStream and provides the decompressed data as a
-// ZeroCopyInputStream.
-//
-// GzipOutputStream is an ZeroCopyOutputStream that compresses data to
-// an underlying ZeroCopyOutputStream.
-
-#ifndef GOOGLE_PROTOBUF_IO_GZIP_STREAM_H__
-#define GOOGLE_PROTOBUF_IO_GZIP_STREAM_H__
-
-#include <google/protobuf/stubs/common.h>
-#include <google/protobuf/io/zero_copy_stream.h>
-#include <zlib.h>
-
-namespace google {
-namespace protobuf {
-namespace io {
-
-// A ZeroCopyInputStream that reads compressed data through zlib
-class LIBPROTOBUF_EXPORT GzipInputStream : public ZeroCopyInputStream {
- public:
-  // Format key for constructor
-  enum Format {
-    // zlib will autodetect gzip header or deflate stream
-    AUTO = 0,
-
-    // GZIP streams have some extra header data for file attributes.
-    GZIP = 1,
-
-    // Simpler zlib stream format.
-    ZLIB = 2,
-  };
-
-  // buffer_size and format may be -1 for default of 64kB and GZIP format
-  explicit GzipInputStream(
-      ZeroCopyInputStream* sub_stream,
-      Format format = AUTO,
-      int buffer_size = -1);
-  virtual ~GzipInputStream();
-
-  // Return last error message or NULL if no error.
-  inline const char* ZlibErrorMessage() const {
-    return zcontext_.msg;
-  }
-  inline int ZlibErrorCode() const {
-    return zerror_;
-  }
-
-  // implements ZeroCopyInputStream ----------------------------------
-  bool Next(const void** data, int* size);
-  void BackUp(int count);
-  bool Skip(int count);
-  int64 ByteCount() const;
-
- private:
-  Format format_;
-
-  ZeroCopyInputStream* sub_stream_;
-
-  z_stream zcontext_;
-  int zerror_;
-
-  void* output_buffer_;
-  void* output_position_;
-  size_t output_buffer_length_;
-  int64 byte_count_;
-
-  int Inflate(int flush);
-  void DoNextOutput(const void** data, int* size);
-
-  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(GzipInputStream);
-};
-
-
-class LIBPROTOBUF_EXPORT GzipOutputStream : public ZeroCopyOutputStream {
- public:
-  // Format key for constructor
-  enum Format {
-    // GZIP streams have some extra header data for file attributes.
-    GZIP = 1,
-
-    // Simpler zlib stream format.
-    ZLIB = 2,
-  };
-
-  struct Options {
-    // Defaults to GZIP.
-    Format format;
-
-    // What size buffer to use internally.  Defaults to 64kB.
-    int buffer_size;
-
-    // A number between 0 and 9, where 0 is no compression and 9 is best
-    // compression.  Defaults to Z_DEFAULT_COMPRESSION (see zlib.h).
-    int compression_level;
-
-    // Defaults to Z_DEFAULT_STRATEGY.  Can also be set to Z_FILTERED,
-    // Z_HUFFMAN_ONLY, or Z_RLE.  See the documentation for deflateInit2 in
-    // zlib.h for definitions of these constants.
-    int compression_strategy;
-
-    Options();  // Initializes with default values.
-  };
-
-  // Create a GzipOutputStream with default options.
-  explicit GzipOutputStream(ZeroCopyOutputStream* sub_stream);
-
-  // Create a GzipOutputStream with the given options.
-  GzipOutputStream(
-      ZeroCopyOutputStream* sub_stream,
-      const Options& options);
-
-  virtual ~GzipOutputStream();
-
-  // Return last error message or NULL if no error.
-  inline const char* ZlibErrorMessage() const {
-    return zcontext_.msg;
-  }
-  inline int ZlibErrorCode() const {
-    return zerror_;
-  }
-
-  // Flushes data written so far to zipped data in the underlying stream.
-  // It is the caller's responsibility to flush the underlying stream if
-  // necessary.
-  // Compression may be less efficient stopping and starting around flushes.
-  // Returns true if no error.
-  //
-  // Please ensure that block size is > 6. Here is an excerpt from the zlib
-  // doc that explains why:
-  //
-  // In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that avail_out
-  // is greater than six to avoid repeated flush markers due to
-  // avail_out == 0 on return.
-  bool Flush();
-
-  // Writes out all data and closes the gzip stream.
-  // It is the caller's responsibility to close the underlying stream if
-  // necessary.
-  // Returns true if no error.
-  bool Close();
-
-  // implements ZeroCopyOutputStream ---------------------------------
-  bool Next(void** data, int* size);
-  void BackUp(int count);
-  int64 ByteCount() const;
-
- private:
-  ZeroCopyOutputStream* sub_stream_;
-  // Result from calling Next() on sub_stream_
-  void* sub_data_;
-  int sub_data_size_;
-
-  z_stream zcontext_;
-  int zerror_;
-  void* input_buffer_;
-  size_t input_buffer_length_;
-
-  // Shared constructor code.
-  void Init(ZeroCopyOutputStream* sub_stream, const Options& options);
-
-  // Do some compression.
-  // Takes zlib flush mode.
-  // Returns zlib error code.
-  int Deflate(int flush);
-
-  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(GzipOutputStream);
-};
-
-}  // namespace io
-}  // namespace protobuf
-
-}  // namespace google
-#endif  // GOOGLE_PROTOBUF_IO_GZIP_STREAM_H__