Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/src/google/protobuf/compiler/javanano/javanano_extension.h

-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// http://code.google.com/p/protobuf/
-//
-// 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: bduff@google.com (Brian Duff)
-//  Based on original Protocol Buffers design by
-//  Sanjay Ghemawat, Jeff Dean, and others.
-
-#ifndef GOOGLE_PROTOBUF_COMPILER_JAVANANO_EXTENSION_H_
-#define GOOGLE_PROTOBUF_COMPILER_JAVANANO_EXTENSION_H_
-
-#include <google/protobuf/stubs/common.h>
-#include <google/protobuf/compiler/javanano/javanano_params.h>
-#include <google/protobuf/descriptor.pb.h>
-
-
-namespace google {
-namespace protobuf {
-  namespace io {
-    class Printer;             // printer.h
-  }
-}
-
-namespace protobuf {
-namespace compiler {
-namespace javanano {
-
-class ExtensionGenerator {
- public:
-  explicit ExtensionGenerator(const FieldDescriptor* descriptor, const Params& params);
-  ~ExtensionGenerator();
-
-  void Generate(io::Printer* printer) const;
-
- private:
-  const Params& params_;
-  const FieldDescriptor* descriptor_;
-  map<string, string> variables_;
-
-  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ExtensionGenerator);
-};
-
-}  // namespace javanano
-}  // namespace compiler
-}  // namespace protobuf
-}  // namespace google
-
-#endif  // GOOGLE_PROTOBUF_COMPILER_JAVANANO_EXTENSION_H_