Added more error checking for audio packets.

remoting/client/audio_decode_scheduler.cc

 // Copyright (c) 2012 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/client/audio_decode_scheduler.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "remoting/client/audio_player.h"
@@ skipping 33 matching lines @@
   scoped_ptr<AudioPacket> decoded_packet = decoder_->Decode(packet.Pass());
 
   main_task_runner_->PostTask(FROM_HERE, base::Bind(
       &AudioDecodeScheduler::ProcessDecodedPacket, base::Unretained(this),
       base::Passed(decoded_packet.Pass()), done));
 }
 
 void AudioDecodeScheduler::ProcessDecodedPacket(scoped_ptr<AudioPacket> packet,
                                                 const base::Closure& done) {
   DCHECK(main_task_runner_->BelongsToCurrentThread());
-  audio_player_->ProcessAudioPacket(packet.Pass());
+  // Only process |packet| if it is non-NULL.
+  if (packet.get())
+    audio_player_->ProcessAudioPacket(packet.Pass());
   done.Run();
 }
 
 }  // namespace remoting