Fix bug in net/quic/quic_reliable_client_stream.cc found by pkastings.

net/quic/quic_reliable_client_stream.cc

 // 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.
 
 #include "net/quic/quic_reliable_client_stream.h"
 
 #include "base/callback_helpers.h"
 #include "net/base/net_errors.h"
 #include "net/quic/quic_session.h"
 #include "net/quic/quic_write_blocked_list.h"
 
 namespace net {
 
 QuicReliableClientStream::QuicReliableClientStream(QuicStreamId id,
                                                    QuicSession* session,
                                                    const BoundNetLog& net_log)
     : QuicDataStream(id, session),
       net_log_(net_log),
       delegate_(NULL) {
 }
 
 QuicReliableClientStream::~QuicReliableClientStream() {
   if (delegate_)
     delegate_->OnClose(connection_error());
 }
 
 uint32 QuicReliableClientStream::ProcessData(const char* data,
                                              uint32 data_len) {
   // TODO(rch): buffer data if we don't have a delegate.
-  if (!delegate_)
-    return ERR_ABORTED;
+  if (!delegate_) {
+    DLOG(ERROR) << "Missing delegate";
+    Reset(QUIC_STREAM_CANCELLED);
+    return 0;
+  }
 
   int rv = delegate_->OnDataReceived(data, data_len);
   if (rv != OK) {
     DLOG(ERROR) << "Delegate refused data, rv: " << rv;
     Reset(QUIC_BAD_APPLICATION_PAYLOAD);
     return 0;
   }
   return data_len;
 }
 
@@ skipping 54 matching lines @@
   bool can_write =  session()->connection()->CanWrite(HAS_RETRANSMITTABLE_DATA);
   if (!can_write) {
     session()->MarkWriteBlocked(id(), EffectivePriority());
     DCHECK(callback_.is_null());
     callback_ = callback;
   }
   return can_write;
 }
 
 }  // namespace net