Instead of enqueueing SPDY frames, enqueue SPDY streams that are ready to produce data.

net/spdy/spdy_io_buffer.cc

 // Copyright (c) 2012 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/spdy_io_buffer.h"
 #include "net/spdy/spdy_stream.h"
 
 namespace net {
 
 // static
 uint64 SpdyIOBuffer::order_ = 0;
 
 SpdyIOBuffer::SpdyIOBuffer(
     IOBuffer* buffer, int size, RequestPriority priority, SpdyStream* stream)
   : buffer_(new DrainableIOBuffer(buffer, size)),
     priority_(priority),
     position_(++order_),
     stream_(stream) {}
 
 SpdyIOBuffer::SpdyIOBuffer() : priority_(HIGHEST), position_(0), stream_(NULL) {
 }
 
+SpdyIOBuffer::SpdyIOBuffer(const SpdyIOBuffer& rhs) {
+  buffer_ = rhs.buffer_;
+  priority_ = rhs.priority_;
+  position_ = rhs.position_;
+  stream_ = rhs.stream_;
+}
+
 SpdyIOBuffer::~SpdyIOBuffer() {}
 
+SpdyIOBuffer& SpdyIOBuffer::operator=(const SpdyIOBuffer& rhs) {
+  buffer_ = rhs.buffer_;
+  priority_ = rhs.priority_;
+  position_ = rhs.position_;
+  stream_ = rhs.stream_;
+  return *this;
+}
+
 void SpdyIOBuffer::release() {
   buffer_ = NULL;
   stream_ = NULL;
 }
 
 }  // namespace net