net: Use stl utilities from the base namespace

net/quic/core/crypto/crypto_server_config_protobuf.cc

 // Copyright (c) 2013 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/crypto/crypto_server_config_protobuf.h"
 
 #include "net/quic/core/quic_time.h"
 
 namespace net {
 
 QuicServerConfigProtobuf::QuicServerConfigProtobuf()
     : primary_time_(QuicWallTime::Zero().ToUNIXSeconds()), priority_(0) {}
 
 QuicServerConfigProtobuf::~QuicServerConfigProtobuf() {
-  STLDeleteElements(&keys_);
+  base::STLDeleteElements(&keys_);
 }
 
 }  // namespace net