Fix out of order SYN_STEAM frames.

net/spdy/spdy_frame_producer.h

+// 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.
+
+#ifndef NET_SPDY_SPDY_FRAME_PRODUCER_H_
+#define NET_SPDY_SPDY_FRAME_PRODUCER_H_
+#pragma once
+
+#include "net/base/request_priority.h"
+#include "net/spdy/spdy_protocol.h"
+
+namespace net {
+
+class SpdyStream;
+
+class NET_EXPORT_PRIVATE SpdyFrameProducer {
+ public:
+  SpdyFrameProducer() {}
+
+  virtual SpdyFrame* ProduceNextFrame() = 0;
+
+  virtual RequestPriority GetPriority() const = 0;
+
+  virtual SpdyStream* GetSpdyStream() const = 0;
+
+ protected:
+  virtual ~SpdyFrameProducer() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SpdyFrameProducer);
+};
+
+}  // namespace net
+
+#endif  // NET_SPDY_SPDY_FRAME_PRODUCER_H_