media: Change auto to not deduce raw pointers.

media/midi/midi_manager_alsa.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 "media/midi/midi_manager_alsa.h"
 
 #include <errno.h>
 #include <poll.h>
 #include <stddef.h>
 #include <stdlib.h>
@@ skipping 671 matching lines @@
 
 std::unique_ptr<MidiManagerAlsa::TemporaryMidiPortState>
 MidiManagerAlsa::AlsaSeqState::ToMidiPortState(const AlsaCardMap& alsa_cards) {
   std::unique_ptr<MidiManagerAlsa::TemporaryMidiPortState> midi_ports(
       new TemporaryMidiPortState);
   auto card_it = alsa_cards.begin();
 
   int card_midi_device = -1;
   for (const auto& client_pair : clients_) {
     int client_id = client_pair.first;
-    const auto& client = client_pair.second.get();
+    auto* client = client_pair.second.get();
 
     // Get client metadata.
     const std::string client_name = client->name();
     std::string manufacturer;
     std::string driver;
     std::string path;
     MidiPort::Id id;
     std::string card_name;
     std::string card_longname;
     int midi_device = -1;
@@ skipping 691 matching lines @@
   source_map_[AddrToInt(client_id, port_id)] = port_index;
   return true;
 }
 
 MidiManager* MidiManager::Create() {
   return new MidiManagerAlsa();
 }
 
 }  // namespace midi
 }  // namespace media