Replace calls to set.count() with ContainsKey in QUIC.

net/quic/quic_connection.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_connection.h"
 
 #include <string.h>
 #include <sys/types.h>
 
 #include <algorithm>
@@ skipping 1703 matching lines @@
   ++stats_.packets_revived;
   framer_.ProcessRevivedPacket(&revived_header,
                                StringPiece(revived_payload, len));
 }
 
 QuicFecGroup* QuicConnection::GetFecGroup() {
   QuicFecGroupNumber fec_group_num = last_header_.fec_group;
   if (fec_group_num == 0) {
     return nullptr;
   }
-  if (group_map_.count(fec_group_num) == 0) {
+  if (!ContainsKey(group_map_, fec_group_num)) {
     if (group_map_.size() >= kMaxFecGroups) {  // Too many groups
       if (fec_group_num < group_map_.begin()->first) {
         // The group being requested is a group we've seen before and deleted.
         // Don't recreate it.
         return nullptr;
       }
       // Clear the lowest group number.
       delete group_map_.begin()->second;
       group_map_.erase(group_map_.begin());
     }
@@ skipping 296 matching lines @@
   }
   for (size_t i = 0; i < retransmittable_frames->frames().size(); ++i) {
     if (retransmittable_frames->frames()[i].type == CONNECTION_CLOSE_FRAME) {
       return true;
     }
   }
   return false;
 }
 
 }  // namespace net