media: Pass SetCdmReadyCB in {Audio|Video}Decoder::Initialize().

media/filters/opus_audio_decoder.cc

Index: media/filters/opus_audio_decoder.cc
diff --git a/media/filters/opus_audio_decoder.cc b/media/filters/opus_audio_decoder.cc
index 454dc29f4670ddc8a8e87084251be0b8ca79ba20..d1e759bf459912a756301643c7a716bc7563971b 100644
--- a/media/filters/opus_audio_decoder.cc
+++ b/media/filters/opus_audio_decoder.cc
@@ -132,6 +132,7 @@ std::string OpusAudioDecoder::GetDisplayName() const {
 }
 
 void OpusAudioDecoder::Initialize(const AudioDecoderConfig& config,
+                                  const SetCdmReadyCB& /* set_cdm_ready_cb */,
                                   const InitCB& init_cb,
                                   const OutputCB& output_cb) {
   DCHECK(task_runner_->BelongsToCurrentThread());