Cast: Added support for AES-CTR crypto.

media/cast/audio_sender/audio_encoder.cc

Index: media/cast/audio_sender/audio_encoder.cc
diff --git a/media/cast/audio_sender/audio_encoder.cc b/media/cast/audio_sender/audio_encoder.cc
index 3cfca0dfc82150f3e4ec5bf9bfec84337a1ad152..673b74434eec55c9eba3ae78bf32def8e1316ea2 100644
--- a/media/cast/audio_sender/audio_encoder.cc
+++ b/media/cast/audio_sender/audio_encoder.cc
@@ -27,7 +27,8 @@ class WebrtEncodedDataCallback : public webrtc::AudioPacketizationCallback {
       : codec_(codec),
         frequency_(frequency),
         cast_environment_(cast_environment),
-        last_timestamp_(0) {}
+        last_timestamp_(0),
+        frame_id_(0) {}
 
   virtual int32 SendData(
       webrtc::FrameType /*frame_type*/,
@@ -38,6 +39,7 @@ class WebrtEncodedDataCallback : public webrtc::AudioPacketizationCallback {
       const webrtc::RTPFragmentationHeader* /*fragmentation*/) OVERRIDE {
     scoped_ptr<EncodedAudioFrame> audio_frame(new EncodedAudioFrame());
     audio_frame->codec = codec_;
+    audio_frame->frame_id = frame_id_++;
     audio_frame->samples = timestamp - last_timestamp_;
     DCHECK(audio_frame->samples <= kMaxNumberOfSamples);
     last_timestamp_ = timestamp;
@@ -63,6 +65,7 @@ class WebrtEncodedDataCallback : public webrtc::AudioPacketizationCallback {
   const int frequency_;
   scoped_refptr<CastEnvironment> cast_environment_;
   uint32 last_timestamp_;
+  uint32 frame_id_;
   base::TimeTicks recorded_time_;
   const AudioEncoder::FrameEncodedCallback* frame_encoded_callback_;
 };