Fix: Adding list of supported codecs for MP4 containers

net/base/mime_util.h

Index: net/base/mime_util.h
diff --git a/net/base/mime_util.h b/net/base/mime_util.h
index 9662e9656e397de2d48adedbfae590a3249ff4a7..e5a34795df43c6f5349682c7763a93d6a8698de6 100644
--- a/net/base/mime_util.h
+++ b/net/base/mime_util.h
@@ -76,12 +76,16 @@ NET_EXPORT void ParseCodecString(const std::string& codecs,
 // certain subset of codecs.
 NET_EXPORT bool IsStrictMediaMimeType(const std::string& mime_type);
 
+enum CanPlayType { IsNotSupported, IsSupported, MayBeSupported };
+
 // Check to see if a particular MIME type is in our list which only supports a
-// certain subset of codecs. Returns true if and only if all codecs are
-// supported for that specific MIME type, false otherwise. If this returns
-// false you will still need to check if the media MIME tpyes and codecs are
-// supported.
-NET_EXPORT bool IsSupportedStrictMediaMimeType(
+// certain subset of codecs.
+// * Returns IsSupported if and only if all the codecs are supported for that
+//   specific MIME type.
+// * Returns MayBeSupported if codecs paramter is empty or has a profile
+//   parameter which can't be decided whether it is supported or not.
+// * Returns IsNotSupported if none of the aforementioned conditions are met.
+NET_EXPORT CanPlayType IsSupportedStrictMediaMimeType(
     const std::string& mime_type,
     const std::vector<std::string>& codecs);