Server push cancellation: add methods in session layer to cancel push given the pushed url. Not in …

net/quic/core/quic_client_session_base.cc

 // Copyright 2014 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/core/quic_client_session_base.h"
 
 #include "net/quic/core/quic_client_promised_info.h"
 #include "net/quic/core/quic_flags.h"
 #include "net/quic/core/spdy_utils.h"
 
@@ skipping 184 matching lines @@
 
 void QuicClientSessionBase::ResetPromised(QuicStreamId id,
                                           QuicRstStreamErrorCode error_code) {
   SendRstStream(id, error_code, 0);
   if (!IsOpenStream(id)) {
     MaybeIncreaseLargestPeerStreamId(id);
     InsertLocallyClosedStreamsHighestOffset(id, 0);
   }
 }
 
+void QuicClientSessionBase::CancelPush(const GURL& url) {}
+
 void QuicClientSessionBase::CloseStreamInner(QuicStreamId stream_id,
                                              bool locally_reset) {
   QuicSpdySession::CloseStreamInner(stream_id, locally_reset);
   headers_stream()->MaybeReleaseSequencerBuffer();
 }
 
 bool QuicClientSessionBase::ShouldReleaseHeadersStreamSequencerBuffer() {
   return num_active_requests() == 0 && promised_by_id_.empty();
 }
 
 }  // namespace net