Add AudioEncoder::GetTargetBitrate

webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc

Index: webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc
diff --git a/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc b/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc
index ed496186469e1a7ccc4d48858fc1635528f6680e..3ece75ac3d06bb567d683385d3e624b91cf902dc 100644
--- a/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc
+++ b/webrtc/modules/audio_coding/codecs/g711/audio_encoder_pcm.cc
@@ -60,7 +60,7 @@ int AudioEncoderPcm::NumChannels() const {
 }
 
 size_t AudioEncoderPcm::MaxEncodedBytes() const {
-  return full_frame_samples_;
+  return full_frame_samples_ * BytesPerSample();
 }
 
 int AudioEncoderPcm::Num10MsFramesInNextPacket() const {
@@ -71,6 +71,10 @@ int AudioEncoderPcm::Max10MsFramesInAPacket() const {
   return num_10ms_frames_per_packet_;
 }
 
+int AudioEncoderPcm::GetTargetBitrate() const {
+  return 8 * BytesPerSample() * SampleRateHz() * NumChannels();
+}
+
 AudioEncoder::EncodedInfo AudioEncoderPcm::EncodeInternal(
     uint32_t rtp_timestamp,
     const int16_t* audio,