Align base::hash_map with C++11.

net/quic/quic_ack_notifier_manager.h

 // Copyright 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.
 
 #ifndef NET_QUIC_QUIC_ACK_NOTIFIER_MANAGER_H_
 #define NET_QUIC_QUIC_ACK_NOTIFIER_MANAGER_H_
 
 #include <map>
 
 #include "base/containers/hash_tables.h"
 #include "net/quic/quic_protocol.h"
 
-#if defined(COMPILER_GCC)
-namespace BASE_HASH_NAMESPACE {
-template<>
-struct hash<net::QuicAckNotifier*> {
-  std::size_t operator()(const net::QuicAckNotifier* ptr) const {
-    return hash<size_t>()(reinterpret_cast<size_t>(ptr));
-  }
-};
-}
-#endif
-
 namespace net {
 
 class QuicAckNotifier;
 
 // The AckNotifierManager is used by the QuicSentPacketManager to keep track of
 // all the AckNotifiers currently active. It owns the AckNotifiers which it gets
 // from the serialized packets passed into OnSerializedPacket. It maintains both
 // a set of AckNotifiers and a map from sequence number to AckNotifier the sake
 // of efficiency - we can quickly check the map to see if any AckNotifiers are
 // interested in a given sequence number.
@@ skipping 37 matching lines @@
   // number, call OnAck for all mapped AckNotifiers.
   // Does not own the AckNotifiers.
   AckNotifierMap ack_notifier_map_;
 
   DISALLOW_COPY_AND_ASSIGN(AckNotifierManager);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_ACK_NOTIFIER_MANAGER_H_