Remove now unused Balsa code.

net/tools/balsa/balsa_headers_token_utils.h

-// Copyright 2013 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.
-
-// Utility class that performs basic operations on header value tokens: parsing
-// them out, checking for presense of certain tokens, and removing them.
-
-#ifndef NET_TOOLS_BALSA_BALSA_HEADERS_TOKEN_UTILS_H_
-#define NET_TOOLS_BALSA_BALSA_HEADERS_TOKEN_UTILS_H_
-
-#include "base/strings/string_piece.h"
-#include "net/tools/balsa/balsa_headers.h"
-
-namespace net {
-
-class BalsaHeadersTokenUtils {
- public:
-  // All the functions below respect multiple header lines with the same key.
-
-  // Checks whether the last header token matches a given value. Useful to
-  // check the outer-most content or transfer-encoding, for example. In the
-  // presence of multiple header lines with given key, the last token of the
-  // last line is compared.
-  static bool CheckHeaderForLastToken(const BalsaHeaders& headers,
-                                      const base::StringPiece& key,
-                                      const base::StringPiece& token);
-
-  // Tokenizes header value for a given key. In the presence of multiple lines
-  // with that key, all of them will be tokenized and tokens will be added to
-  // the list in the order in which they are encountered.
-  static void TokenizeHeaderValue(const BalsaHeaders& headers,
-                                  const base::StringPiece& key,
-                                  BalsaHeaders::HeaderTokenList* tokens);
-
-  // Removes the last token from the header value. In the presence of multiple
-  // header lines with given key, will remove the last token of the last line.
-  // Can be useful if the last encoding has to be removed.
-  static void RemoveLastTokenFromHeaderValue(const base::StringPiece& key,
-                                             BalsaHeaders* headers);
-
-  // Given a pointer to the beginning and the end of the header value
-  // in some buffer, populates tokens list with beginning and end indices
-  // of all tokens present in the value string.
-  static void ParseTokenList(const char* start,
-                             const char* end,
-                             BalsaHeaders::HeaderTokenList* tokens);
-
- private:
-  // Helper function to tokenize a header line once we have its description.
-  static void TokenizeHeaderLine(
-      const BalsaHeaders& headers,
-      const BalsaHeaders::HeaderLineDescription& line,
-      BalsaHeaders::HeaderTokenList* tokens);
-
-  BalsaHeadersTokenUtils();  // Prohibit instantiation
-};
-
-}  // namespace net
-
-#endif  // NET_TOOLS_BALSA_BALSA_HEADERS_TOKEN_UTILS_H_
-