Cast:Transport: Dividing A/V Initialization pipeline

media/cast/audio_sender/audio_sender.cc

Index: media/cast/audio_sender/audio_sender.cc
diff --git a/media/cast/audio_sender/audio_sender.cc b/media/cast/audio_sender/audio_sender.cc
index bdf6b293f0cae0de30bbdfb297ef2e083e47f1b2..4ca58ea6411588a2ecb52d063d6853f7333a55be 100644
--- a/media/cast/audio_sender/audio_sender.cc
+++ b/media/cast/audio_sender/audio_sender.cc
@@ -43,9 +43,11 @@ class LocalRtpSenderStatistics : public RtpSenderStatistics {
       : transport_sender_(transport_sender),
         frequency_(0),
         sender_info_(),
-        rtp_timestamp_(0) {
-    transport_sender_->SubscribeAudioRtpStatsCallback(base::Bind(
-        &LocalRtpSenderStatistics::StoreStatistics, base::Unretained(this)));
+        rtp_timestamp_(0),
+        weak_factory_(this) {
+    transport_sender_->SubscribeAudioRtpStatsCallback(
+        base::Bind(&LocalRtpSenderStatistics::StoreStatistics,
+                   weak_factory_.GetWeakPtr()));
   }
 
   virtual void GetStatistics(const base::TimeTicks& now,
@@ -84,6 +86,8 @@ class LocalRtpSenderStatistics : public RtpSenderStatistics {
   base::TimeTicks time_sent_;
   uint32 rtp_timestamp_;
 
+  base::WeakPtrFactory<LocalRtpSenderStatistics> weak_factory_;
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(LocalRtpSenderStatistics);
 };