Implement PUSH_PROMISE handling in spdy_session

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 16c17a3205465d595b4867d4e4a27ea03a07d3bb..e45b7ad62eb9236639901b66de651cebcb4cc62d 100644
--- a/net/spdy/spdy_session.h
+++ b/net/spdy/spdy_session.h
@@ -537,6 +537,7 @@ class NET_EXPORT SpdySession : public BufferedSpdyFramerVisitorInterface,
 
     SpdyStream* stream;
     bool waiting_for_syn_reply;
+    bool reserved_remote;

[Johnny, 2014/06/17 04:01:33]

Rather than having |reserved_remote| here, add an "IsReservedRemote()" accessor
which queries stream's |io_state_|.

[baranovich, 2014/06/17 21:33:43]

Done.

   };
   typedef std::map<SpdyStreamId, ActiveStreamInfo> ActiveStreamMap;
 
@@ -611,6 +612,12 @@ class NET_EXPORT SpdySession : public BufferedSpdyFramerVisitorInterface,
   // possible.
   void ProcessPendingStreamRequests();
 
+  bool TryCreatePushStream(SpdyStreamId stream_id,
+                           SpdyStreamId associated_stream_id,
+                           SpdyPriority priority,
+                           const SpdyHeaderBlock& headers);
+  void ActivateReservedStreamIterator(ActiveStreamMap::iterator it);
+
   // Close the stream pointed to by the given iterator. Note that that
   // stream may hold the last reference to the session.
   void CloseActiveStreamIterator(ActiveStreamMap::iterator it, int status);
@@ -968,6 +975,7 @@ class NET_EXPORT SpdySession : public BufferedSpdyFramerVisitorInterface,
   // them into a separate ActiveStreamMap, and not deliver network events to
   // them?
   ActiveStreamMap active_streams_;
+  size_t reserved_remote_stream_num_;

[Johnny, 2014/06/17 04:01:33]

How about |num_reserved_remote_streams_| to match
num_active_streams()/num_created_streams()/etc convention used elsewhere. Needs
a good comment about what this is and why it's tracked.

[baranovich, 2014/06/17 21:33:43]

Done. Deleted.

 
   // (Bijective) map from the URL to the ID of the streams that have
   // already started to be pushed by the server, but do not have