SPDY sends RST_STREAM upon cancelling request, or bad header parse data.

net/spdy/spdy_session_pool.h

 // Copyright (c) 2010 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_POOL_H_
 #define NET_SPDY_SPDY_SESSION_POOL_H_
 #pragma once
 
 #include <map>
 #include <list>
@@ skipping 53 matching lines @@
       scoped_refptr<SpdySession>* spdy_session,
       bool is_secure);
 
   // TODO(willchan): Consider renaming to HasReusableSession, since perhaps we
   // should be creating a new session.
   bool HasSession(const HostPortPair& host_port_pair)const;
 
   // Close all Spdy Sessions; used for debugging.
   void CloseAllSessions();
 
-  // Removes a SpdySession from the SpdySessionPool.
+  // Removes a SpdySession from the SpdySessionPool. This should only be called
+  // by SpdySession, because otherwise session->state_ is not set to CLOSED.
   void Remove(const scoped_refptr<SpdySession>& session);
 
   // NetworkChangeNotifier::Observer methods:
 
   // We flush all idle sessions and release references to the active ones so
   // they won't get re-used.  The active ones will either complete successfully
   // or error out due to the IP address change.
   virtual void OnIPAddressChanged();
 
  private:
@@ skipping 23 matching lines @@
   SpdySessionsMap sessions_;
 
   static int g_max_sessions_per_domain;
 
   DISALLOW_COPY_AND_ASSIGN(SpdySessionPool);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_SESSION_POOL_H_