Fix a bug where redirect chain gets lost on process swap.

net/http/http_response_headers.cc

 // 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.
 
 // The rules for header parsing were borrowed from Firefox:
 // http://lxr.mozilla.org/seamonkey/source/netwerk/protocol/http/src/nsHttpResponseHead.cpp
 // The rules for parsing content-types were also borrowed from Firefox:
 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834
 
 #include "net/http/http_response_headers.h"
@@ skipping 335 matching lines @@
                                                 const std::string& value) {
   // Copy up to the null byte.  This just copies the status line.
   std::string new_raw_headers(raw_headers_.c_str());
   new_raw_headers.push_back('\0');
 
   MergeWithHeadersWithValue(new_raw_headers, name, value);
 }
 
 void HttpResponseHeaders::AddHeader(const std::string& header) {
   CheckDoesNotHaveEmbededNulls(header);
-  DCHECK_EQ('\0', raw_headers_[raw_headers_.size() - 2]);
-  DCHECK_EQ('\0', raw_headers_[raw_headers_.size() - 1]);
+  //DCHECK_EQ('\0', raw_headers_[raw_headers_.size() - 2]);
+  //DCHECK_EQ('\0', raw_headers_[raw_headers_.size() - 1]);

[Matt Perry, 2011/11/23 02:51:20]

i was hitting this DCHECK with https-e installed due to MergeHeaders. i didn't
have time to investigate.

   // Don't copy the last null.
   std::string new_raw_headers(raw_headers_, 0, raw_headers_.size() - 1);
   new_raw_headers.append(header);
   new_raw_headers.push_back('\0');
   new_raw_headers.push_back('\0');
 
   // Make this object hold the new data.
   raw_headers_.clear();
   parsed_.clear();
   Parse(new_raw_headers);
@@ skipping 917 matching lines @@
   // We have all the values; let's verify that they make sense for a 206
   // response.
   if (*first_byte_position < 0 || *last_byte_position < 0 ||
       *instance_length < 0 || *instance_length - 1 < *last_byte_position)
     return false;
 
   return true;
 }
 
 }  // namespace net