Allow large response headers to buffer in HpackDecoder.

net/spdy/chromium/header_coalescer.cc

 // Copyright (c) 2016 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.
 
 #include "net/spdy/chromium/header_coalescer.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
@@ skipping 13 matching lines @@
   auto dict = base::MakeUnique<base::DictionaryValue>();
   dict->SetString("header_name", header_name);
   dict->SetString("header_value", ElideHeaderValueForNetLog(
                                       capture_mode, header_name.as_string(),
                                       header_value.as_string()));
   return std::move(dict);
 }
 
 }  // namespace
 
-const size_t kMaxHeaderListSize = 256 * 1024;
-
 HeaderCoalescer::HeaderCoalescer(const NetLogWithSource& net_log)
     : net_log_(net_log) {}
 
 void HeaderCoalescer::OnHeader(SpdyStringPiece key, SpdyStringPiece value) {
   if (error_seen_)
     return;
   if (!AddHeader(key, value)) {
     error_seen_ = true;
     if (net_log_.IsCapturing()) {
       net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_RECV_INVALID_HEADER,
@@ skipping 56 matching lines @@
       SpdyStringPiece("\0", 1).AppendToString(&s);
     }
     value.AppendToString(&s);
     headers_[key] = s;
   }
   return true;
 }
 
 
 }  // namespace net