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

third_party/protobuf/src/google/protobuf/compiler/objectivec/objectivec_enum_field.h

-// 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,
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-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_ENUM_FIELD_H__
-#define GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_ENUM_FIELD_H__
-
-#include <map>
-#include <string>
-#include <google/protobuf/compiler/objectivec/objectivec_field.h>
-
-namespace google {
-namespace protobuf {
-namespace compiler {
-namespace objectivec {
-
-class EnumFieldGenerator : public SingleFieldGenerator {
-  friend FieldGenerator* FieldGenerator::Make(const FieldDescriptor* field);
-
- public:
-  virtual void GenerateFieldDescriptionTypeSpecific(io::Printer* printer) const;
-  virtual void GenerateCFunctionDeclarations(io::Printer* printer) const;
-  virtual void GenerateCFunctionImplementations(io::Printer* printer) const;
-  virtual void DetermineForwardDeclarations(set<string>* fwd_decls) const;
-
- protected:
-  explicit EnumFieldGenerator(const FieldDescriptor* descriptor);
-  virtual ~EnumFieldGenerator();
-
- private:
-  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(EnumFieldGenerator);
-};
-
-class RepeatedEnumFieldGenerator : public RepeatedFieldGenerator {
-  friend FieldGenerator* FieldGenerator::Make(const FieldDescriptor* field);
-
- public:
-  virtual void GenerateFieldDescriptionTypeSpecific(io::Printer* printer) const;
-
- protected:
-  RepeatedEnumFieldGenerator(const FieldDescriptor* descriptor);
-  virtual ~RepeatedEnumFieldGenerator();
-
- private:
-  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(RepeatedEnumFieldGenerator);
-};
-
-}  // namespace objectivec
-}  // namespace compiler
-}  // namespace protobuf
-}  // namespace google
-#endif  // GOOGLE_PROTOBUF_COMPILER_OBJECTIVEC_ENUM_FIELD_H__