Refactor VP9 codec string parsing

media/base/video_codecs.h

Index: media/base/video_codecs.h
diff --git a/media/base/video_codecs.h b/media/base/video_codecs.h
index 6218f7cda3a3a8aa98c3956b67445c7ea4b88646..0937422aadbf4863210b31a76b967035b1d40c90 100644
--- a/media/base/video_codecs.h
+++ b/media/base/video_codecs.h
@@ -78,6 +78,19 @@ enum VideoCodecProfile {
 std::string MEDIA_EXPORT GetCodecName(VideoCodec codec);
 std::string MEDIA_EXPORT GetProfileName(VideoCodecProfile profile);
 
+// ParseNewStyleVp9CodecID handles parsing of new style vp9 codec IDs per
+// proposed VP Codec ISO Media File Format Binding specification:
+// https://storage.googleapis.com/downloads.webmproject.org/docs/vp9/vp-codec-iso-media-file-format-binding-20160516-draft.pdf
+// ParseLegacyVp9CodecID handles parsing of legacy VP9 codec strings defined
+// for WebM.
+// TODO(kqyang): Consolidate the two functions once we address crbug.com/667834
+MEDIA_EXPORT bool ParseNewStyleVp9CodecID(const std::string& codec_id,
+                                          VideoCodecProfile* profile,
+                                          uint8_t* level_idc);
+MEDIA_EXPORT bool ParseLegacyVp9CodecID(const std::string& codec_id,
+                                        VideoCodecProfile* profile,
+                                        uint8_t* level_idc);
+
 // Handle parsing AVC/H.264 codec ids as outlined in RFC 6381 and ISO-14496-10.
 MEDIA_EXPORT bool ParseAVCCodecId(const std::string& codec_id,
                                   VideoCodecProfile* profile,