Use MessageLoopProxy for network message loop.

remoting/host/heartbeat_sender.h

 // Copyright (c) 2011 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 REMOTING_HOST_HEARTBEAT_SENDER_H_
 #define REMOTING_HOST_HEARTBEAT_SENDER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer.h"
 #include "remoting/host/host_key_pair.h"
 #include "remoting/host/host_status_observer.h"
 #include "remoting/jingle_glue/iq_request.h"
 #include "testing/gtest/include/gtest/gtest_prod.h"
 
+namespace base {
+class MessageLoopProxy;
+}  // namespace base
+
 namespace remoting {
 
 class IqRequest;
 class HostKeyPair;
 class MutableHostConfig;
 
 // HeartbeatSender periodically sends heartbeat stanzas to the Chromoting Bot.
 // Each heartbeat stanza looks as follows:
 //
 // <iq type="set" to="remoting@bot.talk.google.com"
@@ skipping 22 matching lines @@
 //
 // The set-interval tag is used to specify desired heartbeat interval
 // in seconds. The heartbeat-result and the set-interval tags are
 // optional. Host uses default heartbeat interval if it doesn't find
 // set-interval tag in the result Iq stanza it receives from the
 // server.
 //
 // TODO(sergeyu): Is it enough to sign JID and nothing else?
 class HeartbeatSender : public HostStatusObserver {
  public:
-  HeartbeatSender(MessageLoop* main_loop,
+  HeartbeatSender(base::MessageLoopProxy* main_loop,
                   MutableHostConfig* config);
   virtual ~HeartbeatSender();
 
   // Initializes heart-beating for |jingle_client_| with |config_|. Returns
   // false if the config is invalid (e.g. private key cannot be parsed).
   bool Init();
 
   // HostStatusObserver implementation.
   virtual void OnSignallingConnected(SignalStrategy* signal_strategy,
                                      const std::string& full_jid) OVERRIDE;
@@ skipping 20 matching lines @@
   void DoSendStanza();
   void ProcessResponse(const buzz::XmlElement* response);
   void SetInterval(int interval);
 
   // Helper methods used by DoSendStanza() to generate heartbeat stanzas.
   // Caller owns the result.
   buzz::XmlElement* CreateHeartbeatMessage();
   buzz::XmlElement* CreateSignature();
 
   State state_;
-  MessageLoop* message_loop_;
+  scoped_refptr<base::MessageLoopProxy> message_loop_;
   scoped_refptr<MutableHostConfig> config_;
   std::string host_id_;
   HostKeyPair key_pair_;
   std::string full_jid_;
   scoped_ptr<IqRequest> request_;
   int interval_ms_;
   base::RepeatingTimer<HeartbeatSender> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(HeartbeatSender);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_HEARTBEAT_SENDER_H_