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

third_party/protobuf/src/google/protobuf/util/internal/snake2camel_objectwriter.h

Index: third_party/protobuf/src/google/protobuf/util/internal/snake2camel_objectwriter.h
diff --git a/third_party/protobuf/src/google/protobuf/util/internal/snake2camel_objectwriter.h b/third_party/protobuf/src/google/protobuf/util/internal/snake2camel_objectwriter.h
deleted file mode 100644
index 1a32bc56243681fbde613782b008c3abe5f1affa..0000000000000000000000000000000000000000
--- a/third_party/protobuf/src/google/protobuf/util/internal/snake2camel_objectwriter.h
+++ /dev/null
@@ -1,187 +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_UTIL_CONVERTER_SNAKE2CAMEL_OBJECTWRITER_H__
-#define GOOGLE_PROTOBUF_UTIL_CONVERTER_SNAKE2CAMEL_OBJECTWRITER_H__
-
-#include <string>
-
-#include <google/protobuf/stubs/common.h>
-#include <google/protobuf/stubs/strutil.h>
-#include <google/protobuf/stubs/stringpiece.h>
-#include <google/protobuf/util/internal/object_writer.h>
-#include <google/protobuf/util/internal/utility.h>
-
-namespace google {
-namespace protobuf {
-namespace util {
-namespace converter {
-
-// Snake2CamelObjectWriter is an ObjectWriter than translates each field name
-// from snake_case to camelCase. Typical usage is:
-//     ProtoStreamObjectSource psos(...);
-//     JsonObjectWriter jow(...);
-//     Snake2CamelObjectWriter snake_to_camel(&jow);
-//     psos.writeTo(&snake_to_camel);
-class Snake2CamelObjectWriter : public ObjectWriter {
- public:
-  explicit Snake2CamelObjectWriter(ObjectWriter* ow)
-      : ow_(ow), normalize_case_(true) {}
-  virtual ~Snake2CamelObjectWriter() {}
-
-  // ObjectWriter methods.
-  virtual Snake2CamelObjectWriter* StartObject(StringPiece name) {
-    ow_->StartObject(ShouldNormalizeCase(name)
-                         ? StringPiece(StringPiece(ToCamelCase(name)))
-                         : name);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* EndObject() {
-    ow_->EndObject();
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* StartList(StringPiece name) {
-    ow_->StartList(ShouldNormalizeCase(name) ? StringPiece(ToCamelCase(name))
-                                             : name);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* EndList() {
-    ow_->EndList();
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* RenderBool(StringPiece name, bool value) {
-    ow_->RenderBool(
-        ShouldNormalizeCase(name) ? StringPiece(ToCamelCase(name)) : name,
-        value);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* RenderInt32(StringPiece name, int32 value) {
-    ow_->RenderInt32(
-        ShouldNormalizeCase(name) ? StringPiece(ToCamelCase(name)) : name,
-        value);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* RenderUint32(StringPiece name,
-                                                uint32 value) {
-    ow_->RenderUint32(
-        ShouldNormalizeCase(name) ? StringPiece(ToCamelCase(name)) : name,
-        value);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* RenderInt64(StringPiece name, int64 value) {
-    ow_->RenderInt64(
-        ShouldNormalizeCase(name) ? StringPiece(ToCamelCase(name)) : name,
-        value);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* RenderUint64(StringPiece name,
-                                                uint64 value) {
-    ow_->RenderUint64(
-        ShouldNormalizeCase(name) ? StringPiece(ToCamelCase(name)) : name,
-        value);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* RenderDouble(StringPiece name,
-                                                double value) {
-    ow_->RenderDouble(
-        ShouldNormalizeCase(name) ? StringPiece(ToCamelCase(name)) : name,
-        value);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* RenderFloat(StringPiece name, float value) {
-    ow_->RenderFloat(
-        ShouldNormalizeCase(name) ? StringPiece(ToCamelCase(name)) : name,
-        value);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* RenderString(StringPiece name,
-                                                StringPiece value) {
-    ow_->RenderString(
-        ShouldNormalizeCase(name) ? StringPiece(ToCamelCase(name)) : name,
-        value);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* RenderBytes(StringPiece name,
-                                               StringPiece value) {
-    ow_->RenderBytes(
-        ShouldNormalizeCase(name) ? StringPiece(ToCamelCase(name)) : name,
-        value);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* RenderNull(StringPiece name) {
-    ow_->RenderNull(ShouldNormalizeCase(name) ? StringPiece(ToCamelCase(name))
-                                              : name);
-    return this;
-  }
-
-  virtual Snake2CamelObjectWriter* DisableCaseNormalizationForNextKey() {
-    normalize_case_ = false;
-    return this;
-  }
-
- private:
-  ObjectWriter* ow_;
-  bool normalize_case_;
-
-  bool ShouldNormalizeCase(StringPiece name) {
-    if (normalize_case_) {
-      return !IsCamel(name);
-    } else {
-      normalize_case_ = true;
-      return false;
-    }
-  }
-
-  bool IsCamel(StringPiece name) {
-    return name.empty() || (ascii_islower(name[0]) && !name.contains("_"));
-  }
-
-  GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(Snake2CamelObjectWriter);
-};
-
-}  // namespace converter
-}  // namespace util
-}  // namespace protobuf
-
-}  // namespace google
-#endif  // GOOGLE_PROTOBUF_UTIL_CONVERTER_SNAKE2CAMEL_OBJECTWRITER_H__