Add methods in spdy/quic session to get stream id of pushed stream given the request url

net/spdy/spdy_session.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_SESSION_H_
 #define NET_SPDY_SPDY_SESSION_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 794 matching lines @@
   std::unique_ptr<SpdyStream> ActivateCreatedStream(SpdyStream* stream);
 
   // Inserts a newly-activated stream into |active_streams_|.
   void InsertActivatedStream(std::unique_ptr<SpdyStream> stream);
 
   // Remove all internal references to |stream|, call OnClose() on it,
   // and process any pending stream requests before deleting it.  Note
   // that |stream| may hold the last reference to the session.
   void DeleteStream(std::unique_ptr<SpdyStream> stream, int status);
 
+  // Returns the stream id of the push stream if it is not claimed yet, or 0
+  // otherwise.
+  SpdyStreamId GetStreamIdForPush(const GURL& url);
+
   // Check if we have a pending pushed-stream for this url
   // Returns the stream if found (and returns it from the pending
   // list). Returns NULL otherwise.
   base::WeakPtr<SpdyStream> GetActivePushStream(const GURL& url);
 
   // Delegates to |stream->OnInitialResponseHeadersReceived()|. If an
   // error is returned, the last reference to |this| may have been
   // released.
   int OnInitialResponseHeadersReceived(const SpdyHeaderBlock& response_headers,
                                        base::Time response_time,
@@ skipping 384 matching lines @@
   // Used for posting asynchronous IO tasks.  We use this even though
   // SpdySession is refcounted because we don't need to keep the SpdySession
   // alive if the last reference is within a RunnableMethod.  Just revoke the
   // method.
   base::WeakPtrFactory<SpdySession> weak_factory_;
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_SESSION_H_