Remove usage of base::ObserverList<T>::Iter::GetNext() in //remoting.

remoting/signaling/xmpp_signal_strategy.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 "remoting/signaling/xmpp_signal_strategy.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 348 matching lines @@
 
 void XmppSignalStrategy::Core::OnStanza(
     const std::unique_ptr<buzz::XmlElement> stanza) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
 
   HOST_DLOG << "Received incoming stanza:\n"
             << stanza->Str()
             << "\n=========================================================";
 
-  base::ObserverListBase<Listener>::Iterator it(&listeners_);
-  for (Listener* listener = it.GetNext(); listener; listener = it.GetNext()) {
-    if (listener->OnSignalStrategyIncomingStanza(stanza.get()))
+  for (auto& listener : listeners_) {
+    if (listener.OnSignalStrategyIncomingStanza(stanza.get()))
       return;
   }
 }
 
 void XmppSignalStrategy::Core::OnParserError() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   error_ = NETWORK_ERROR;
   Disconnect();
 }
@@ skipping 169 matching lines @@
 std::string XmppSignalStrategy::GetNextId() {
   return base::Uint64ToString(base::RandUint64());
 }
 
 void XmppSignalStrategy::SetAuthInfo(const std::string& username,
                                      const std::string& auth_token) {
   core_->SetAuthInfo(username, auth_token);
 }
 
 }  // namespace remoting