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

third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_map_field.h

Index: third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_map_field.h
diff --git a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_map_field.h b/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_map_field.h
deleted file mode 100644
index d27d485162b2436cce82a06bf028e9af667bd49e..0000000000000000000000000000000000000000
--- a/third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_map_field.h
+++ /dev/null
@@ -1,76 +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.
-
-#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_MAP_FIELD_H__
-#define GOOGLE_PROTOBUF_COMPILER_CPP_MAP_FIELD_H__
-
-#include <map>
-#include <string>
-
-#include <google/protobuf/compiler/cpp/cpp_message_field.h>
-
-namespace google {
-namespace protobuf {
-namespace compiler {
-namespace cpp {
-
-class MapFieldGenerator : public FieldGenerator {
- public:
-  explicit MapFieldGenerator(const FieldDescriptor* descriptor,
-                             const Options& options);
-  ~MapFieldGenerator();
-
-  // implements FieldGenerator ---------------------------------------
-  void GeneratePrivateMembers(io::Printer* printer) const;
-  void GenerateAccessorDeclarations(io::Printer* printer) const;
-  void GenerateInlineAccessorDefinitions(io::Printer* printer,
-                                         bool is_inline) const;
-  void GenerateClearingCode(io::Printer* printer) const;
-  void GenerateMergingCode(io::Printer* printer) const;
-  void GenerateSwappingCode(io::Printer* printer) const;
-  void GenerateConstructorCode(io::Printer* printer) const;
-  void GenerateMergeFromCodedStream(io::Printer* printer) const;
-  void GenerateSerializeWithCachedSizes(io::Printer* printer) const;
-  void GenerateSerializeWithCachedSizesToArray(io::Printer* printer) const;
-  void GenerateByteSize(io::Printer* printer) const;
-
- private:
-  const FieldDescriptor* descriptor_;
-  map<string, string> variables_;
-
-  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(MapFieldGenerator);
-};
-
-}  // namespace cpp
-}  // namespace compiler
-}  // namespace protobuf
-
-}  // namespace google
-#endif  // GOOGLE_PROTOBUF_COMPILER_CPP_MAP_FIELD_H__