Change the stream_id for streams which are serialized out of order.

net/spdy/spdy_session.h

Index: net/spdy/spdy_session.h
diff --git a/net/spdy/spdy_session.h b/net/spdy/spdy_session.h
index 439c0cc2919ee6c00697b807c4de29cd063ecc31..8e7bb93b6dedd27a42219376b9b4e27989f3b1aa 100644
--- a/net/spdy/spdy_session.h
+++ b/net/spdy/spdy_session.h
@@ -540,6 +540,8 @@ class NET_EXPORT SpdySession : public base::RefCounted<SpdySession>,
   bool read_pending_;
 
   int stream_hi_water_mark_;  // The next stream id to use.
+  // The stream id of the last SYN_STREAM frame written on this session.
+  SpdyStreamId last_syn_stream_id_;
 
   // Queue, for each priority, of pending Create Streams that have not
   // yet been satisfied
@@ -687,6 +689,24 @@ class NetLogSpdySynParameter : public NetLog::EventParameters {
 };
 
 
+class NetLogSpdySynRenumberParameter : public NetLog::EventParameters {
+ public:
+  NetLogSpdySynRenumberParameter(SpdyStreamId old_id,
+                        SpdyStreamId new_id);
+
+  virtual base::Value* ToValue() const OVERRIDE;
+
+ protected:
+  virtual ~NetLogSpdySynRenumberParameter();
+
+ private:
+  const SpdyStreamId old_id_;
+  const SpdyStreamId new_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(NetLogSpdySynRenumberParameter);
+};
+
+
 class NetLogSpdyCredentialParameter : public NetLog::EventParameters {
  public:
   NetLogSpdyCredentialParameter(size_t slot, const std::string& origin);