Change some of QUIC's AckNotifier datastructures from maps to hashmaps

net/quic/quic_packet_generator.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_packet_generator.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "net/quic/quic_ack_notifier.h"
 #include "net/quic/quic_fec_group.h"
@@ skipping 159 matching lines @@
       NOT_RETRANSMISSION, HAS_RETRANSMITTABLE_DATA,
       has_handshake ? IS_HANDSHAKE : NOT_HANDSHAKE)) {
     QuicFrame frame;
     size_t bytes_consumed = packet_creator_.CreateStreamFrame(
         id, data, offset + total_bytes_consumed, fin, &frame);
     ++frames_created;
 
     // We want to track which packet this stream frame ends up in.
     if (FLAGS_quic_attach_ack_notifiers_to_packets) {
       if (notifier != nullptr) {
-        ack_notifiers_.insert(notifier);
+        ack_notifiers_.push_back(notifier);
       }
     } else {
       frame.stream_frame->notifier = notifier;
     }
 
     if (!AddFrame(frame)) {
       LOG(DFATAL) << "Failed to add stream frame.";
       // Inability to add a STREAM frame creates an unrecoverable hole in a
       // the stream, so it's best to close the connection.
       delegate_->CloseConnection(QUIC_INTERNAL_ERROR, false);
@@ skipping 268 matching lines @@
     packet_creator_.set_connection_id_length(PACKET_8BYTE_CONNECTION_ID);
   }
 }
 
 
 void QuicPacketGenerator::set_encryption_level(EncryptionLevel level) {
   packet_creator_.set_encryption_level(level);
 }
 
 }  // namespace net