Adding check for MIME types that do not take codecs parameter

net/base/mime_util.cc

Index: net/base/mime_util.cc
diff --git a/net/base/mime_util.cc b/net/base/mime_util.cc
index 4679dcc02e06e94a52641e6f388088eec5f9f313..9c8e8931b819b924c3e150cc36494303750d4bd8 100644
--- a/net/base/mime_util.cc
+++ b/net/base/mime_util.cc
@@ -82,6 +82,8 @@ class MimeUtil : public PlatformMimeUtil {
       const std::string& mime_type,
       const std::vector<std::string>& codecs) const;
 
+  bool MimeTypeDoesNotNeedCodecs(const std::string& mime_type) const;
+
   void RemoveProprietaryMediaTypesAndCodecsForTests();
 
  private:
@@ -438,7 +440,10 @@ static const MediaFormatStrict format_codec_mappings[] = {
   { "audio/x-wav", "1" },
   { "video/ogg", "opus,theora,vorbis" },
   { "audio/ogg", "opus,vorbis" },
-  { "application/ogg", "opus,theora,vorbis" }
+  { "application/ogg", "opus,theora,vorbis" },
+  { "audio/mpeg", "" },
+  { "audio/mp3", "" },
+  { "audio/x-mp3", "" }
 };
 
 MimeUtil::MimeUtil() {
@@ -710,6 +715,11 @@ bool MimeUtil::IsSupportedStrictMediaMimeType(
       AreSupportedCodecs(it->second, codecs);
 }
 
+bool MimeUtil::MimeTypeDoesNotNeedCodecs(const std::string& mime_type) const {
+  StrictMappings::const_iterator it = strict_format_map_.find(mime_type);
+  return (it != strict_format_map_.end()) && it->second.empty();
+}
+
 void MimeUtil::RemoveProprietaryMediaTypesAndCodecsForTests() {
   for (size_t i = 0; i < arraysize(proprietary_media_types); ++i) {
     non_image_map_.erase(proprietary_media_types[i]);
@@ -790,6 +800,10 @@ bool IsSupportedStrictMediaMimeType(const std::string& mime_type,
   return g_mime_util.Get().IsSupportedStrictMediaMimeType(mime_type, codecs);
 }
 
+bool MimeTypeDoesNotNeedCodecs(const std::string& mime_type) {
+  return g_mime_util.Get().MimeTypeDoesNotNeedCodecs(mime_type);
+}
+
 void ParseCodecString(const std::string& codecs,
                       std::vector<std::string>* codecs_out,
                       const bool strip) {