Remove dependency on headers stream from QuicSession.

net/quic/quic_spdy_session.h

Index: net/quic/quic_spdy_session.h
diff --git a/net/quic/quic_spdy_session.h b/net/quic/quic_spdy_session.h
new file mode 100644
index 0000000000000000000000000000000000000000..b59eb63aa0e527a8336a54261ba47197818ea786
--- /dev/null
+++ b/net/quic/quic_spdy_session.h
@@ -0,0 +1,76 @@
+// Copyright (c) 2015 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_QUIC_QUIC_SPDY_SESSION_H_
+#define NET_QUIC_QUIC_SPDY_SESSION_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "net/quic/quic_data_stream.h"
+#include "net/quic/quic_headers_stream.h"
+#include "net/quic/quic_session.h"
+
+namespace net {
+
+namespace test {
+class QuicSpdySessionPeer;
+}  // namespace test
+
+// A QUIC session with a headers stream.
+class NET_EXPORT_PRIVATE QuicSpdySession : public QuicSession {
+ public:
+  QuicSpdySession(QuicConnection* connection, const QuicConfig& config);
+
+  ~QuicSpdySession() override;
+
+  void Initialize() override;
+
+  // Called by |headers_stream_| when headers have been received for a stream.
+  virtual void OnStreamHeaders(QuicStreamId stream_id,
+                               StringPiece headers_data);
+  // Called by |headers_stream_| when headers with a priority have been
+  // received for this stream.  This method will only be called for server
+  // streams.
+  virtual void OnStreamHeadersPriority(QuicStreamId stream_id,
+                                       QuicPriority priority);
+  // Called by |headers_stream_| when headers have been completely received
+  // for a stream.  |fin| will be true if the fin flag was set in the headers
+  // frame.
+  virtual void OnStreamHeadersComplete(QuicStreamId stream_id,
+                                       bool fin,
+                                       size_t frame_len);
+
+  // Writes |headers| for the stream |id| to the dedicated headers stream.
+  // If |fin| is true, then no more data will be sent for the stream |id|.
+  // If provided, |ack_notifier_delegate| will be registered to be notified when
+  // we have seen ACKs for all packets resulting from this call.
+  size_t WriteHeaders(
+      QuicStreamId id,
+      const SpdyHeaderBlock& headers,
+      bool fin,
+      QuicPriority priority,
+      QuicAckNotifier::DelegateInterface* ack_notifier_delegate);
+
+  QuicHeadersStream* headers_stream() { return headers_stream_.get(); }
+
+ protected:
+  // Override CreateIncomingDynamicStream() and CreateOutgoingDynamicStream()
+  // with QuicDataStream return type to make sure that all data streams are
+  // QuicDataStreams.
+  QuicDataStream* CreateIncomingDynamicStream(QuicStreamId id) override = 0;
+  QuicDataStream* CreateOutgoingDynamicStream() override = 0;
+
+  QuicDataStream* GetSpdyDataStream(const QuicStreamId stream_id);
+
+ private:
+  friend class test::QuicSpdySessionPeer;
+
+  scoped_ptr<QuicHeadersStream> headers_stream_;
+
+  DISALLOW_COPY_AND_ASSIGN(QuicSpdySession);
+};
+
+}  // namespace net
+
+#endif  // NET_QUIC_QUIC_SPDY_SESSION_H_