media: Opus support for WebM in Media Source

media/webm/webm_audio_client.h

Index: media/webm/webm_audio_client.h
diff --git a/media/webm/webm_audio_client.h b/media/webm/webm_audio_client.h
index 1338f5cbd66e78935c5b8de9133ce626b765979d..b4bbe8b01e5f0e17d647d006dbb4a8d34ec35ea5 100644
--- a/media/webm/webm_audio_client.h
+++ b/media/webm/webm_audio_client.h
@@ -31,6 +31,8 @@ class WebMAudioClient : public WebMParserClient {
   // audio track element fields.
   bool InitializeConfig(const std::string& codec_id,
                         const std::vector<uint8>& codec_private,
+                        const int64 seek_pre_roll,
+                        const int64 codec_delay,
                         bool is_encrypted,
                         AudioDecoderConfig* config);