Change other usages of .size() to .empty() when applicable.

remoting/jingle_glue/jingle_thread.cc

 // Copyright (c) 2010 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/jingle_glue/jingle_thread.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/message_pump.h"
 #include "base/time.h"
@@ skipping 145 matching lines @@
   // Returns task pump if the thread is running, otherwise NULL is returned.
 TaskPump* JingleThread::task_pump() {
   return task_pump_;
 }
 
 void JingleThread::OnMessage(talk_base::Message* msg) {
   DCHECK(msg->message_id == kStopMessageId);
 
   // Stop the thread only if there are no more messages left in the queue,
   // otherwise post another task to try again later.
-  if (msgq_.size() > 0 || fPeekKeep_) {
+  if (!msgq_.empty() || fPeekKeep_) {
     Post(this, kStopMessageId);
   } else {
     MessageQueue::Quit();
   }
 }
 
 }  // namespace remoting