Introduce Dolby Vision video codec and Demuxer support

media/base/mime_util_internal.cc

Index: media/base/mime_util_internal.cc
diff --git a/media/base/mime_util_internal.cc b/media/base/mime_util_internal.cc
index 2172a63ca365f04a8c3d43710779172b596868fb..5382e9fd78d821cec0bbda2b566f89fa04556340 100644
--- a/media/base/mime_util_internal.cc
+++ b/media/base/mime_util_internal.cc
@@ -140,6 +140,8 @@ VideoCodec MimeUtilToVideoCodec(MimeUtil::Codec codec) {
       return kCodecVP9;
     case MimeUtil::THEORA:
       return kCodecTheora;
+    case MimeUtil::DOLBY_VISION:
+      return kCodecDolbyVision;
     default:
       break;
   }
@@ -268,6 +270,9 @@ void MimeUtil::AddSupportedMediaFormats() {
   // Only VP9 with valid codec string vp09.xx.xx.xx.xx.xx.xx.xx is supported.
   // See ParseVp9CodecID for details.
   mp4_video_codecs.insert(VP9);
+#if BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING)
+  mp4_video_codecs.insert(DOLBY_VISION);
+#endif  // BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING)
   CodecSet mp4_codecs(mp4_audio_codecs);
   mp4_codecs.insert(mp4_video_codecs.begin(), mp4_video_codecs.end());
 #endif  // BUILDFLAG(USE_PROPRIETARY_CODECS)
@@ -536,6 +541,11 @@ bool MimeUtil::IsCodecSupportedOnAndroid(
       // MediaPlayer only supports VP9 in WebM.
       return mime_type_lower_case == "video/webm";
     }
+
+    case DOLBY_VISION:
+      // This function is only called on Android which doesn't support Dolby
+      // Vision.
+      return false;
   }
 
   return false;
@@ -602,6 +612,13 @@ bool MimeUtil::ParseCodecString(const std::string& mime_type_lower_case,
   }
 #endif
 
+#if BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING)
+  if (ParseDolbyVisionCodecId(codec_id, out_profile, out_level)) {
+    *codec = MimeUtil::DOLBY_VISION;
+    return true;
+  }
+#endif
+
   DVLOG(2) << __func__ << ": Unrecognized codec id " << codec_id;
   return false;
 }
@@ -703,6 +720,7 @@ bool MimeUtil::IsCodecProprietary(Codec codec) const {
     case MPEG4_AAC:
     case H264:
     case HEVC:
+    case DOLBY_VISION:
       return true;
 
     case PCM: