|  | // Copyright 2017 The Chromium Authors. All rights reserved. | 
|  | // Use of this source code is governed by a BSD-style license that can be | 
|  | // found in the LICENSE file. | 
|  |  | 
|  | // Forward declaration of StringPiece types from base/strings/string_piece.h | 
|  |  | 
|  | #ifndef BASE_STRINGS_STRING_PIECE_FORWARD_H_ | 
|  | #define BASE_STRINGS_STRING_PIECE_FORWARD_H_ | 
|  |  | 
|  | #include <string> | 
|  |  | 
|  | #include "base/strings/string16.h" | 
|  |  | 
|  | namespace base { | 
|  |  | 
|  | template <typename STRING_TYPE> | 
|  | class BasicStringPiece; | 
|  | typedef BasicStringPiece<std::string> StringPiece; | 
|  | typedef BasicStringPiece<string16> StringPiece16; | 
|  | typedef BasicStringPiece<std::wstring> WStringPiece; | 
|  |  | 
|  | }  // namespace base | 
|  |  | 
|  | #endif  // BASE_STRINGS_STRING_PIECE_FORWARD_H_ |