Add AudioEncoder::GetTargetBitrate

webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.cc

Index: webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.cc
diff --git a/webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.cc b/webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.cc
index 66d24650a659d9b505dca51cdff39b0527bac6e2..e36675f7205b4657cedc58a86799203ead09bcc0 100644
--- a/webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.cc
+++ b/webrtc/modules/audio_coding/codecs/ilbc/audio_encoder_ilbc.cc
@@ -66,6 +66,14 @@ int AudioEncoderIlbc::Max10MsFramesInAPacket() const {
   return num_10ms_frames_per_packet_;
 }
 
+int AudioEncoderIlbc::SetTargetBitrate(int bits_per_second) {
+  switch (num_10ms_frames_per_packet_) {
+    case 2: case 4:  return 15200;
+    case 3: case 6:  return 13333;

[kwiberg-webrtc, 2015/06/16 19:22:54]

I'd recommend an explanation here. Otherwise these will be very hard to verify
or change.

[hlundin-webrtc, 2015/06/16 21:38:50]

Done.

+    default:  FATAL();
+  }
+}
+
 AudioEncoder::EncodedInfo AudioEncoderIlbc::EncodeInternal(
     uint32_t rtp_timestamp,
     const int16_t* audio,