Ensure HttpResponseHeaders::raw_headers_ always ends with 2 '\0' characters.

net/http/http_response_headers.h

 // Copyright (c) 2011 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.
 
 #ifndef NET_HTTP_HTTP_RESPONSE_HEADERS_H_
 #define NET_HTTP_HTTP_RESPONSE_HEADERS_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 260 matching lines @@
   // with line_begin and end pointing at the begin and end of this line.  If the
   // status line is malformed, returns HttpVersion(0,0).
   static HttpVersion ParseVersion(std::string::const_iterator line_begin,
                                   std::string::const_iterator line_end);
 
   // Tries to extract the status line from a header block, given the first
   // line of said header block.  If the status line is malformed, we'll
   // construct a valid one.  Example input:
   //    HTTP/1.1 200 OK
   // with line_begin and end pointing at the begin and end of this line.
-  // Output will be a normalized version of this, with a trailing \n.
+  // Output will be a normalized version of this.
   void ParseStatusLine(std::string::const_iterator line_begin,
                        std::string::const_iterator line_end,
                        bool has_headers);
 
   // Find the header in our list (case-insensitive) starting with parsed_ at
   // index |from|.  Returns string::npos if not found.
   size_t FindHeader(size_t from, const std::string& name) const;
 
   // Add a header->value pair to our list.  If we already have header in our
   // list, append the value to it.
@@ skipping 63 matching lines @@
 
   // The parsed http version number (not normalized).
   HttpVersion parsed_http_version_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpResponseHeaders);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_RESPONSE_HEADERS_H_