diff --git a/api/media_types.cc b/api/media_types.cc
index 3359f1dea9..79269dbae7 100644
--- a/api/media_types.cc
+++ b/api/media_types.cc
@@ -33,17 +33,4 @@ std::string MediaTypeToString(MediaType type) {
   return "";
 }
 
-MediaType MediaTypeFromString(const std::string& type_str) {
-  if (type_str == webrtc::MediaStreamTrackInterface::kAudioKind) {
-    return MEDIA_TYPE_AUDIO;
-  } else if (type_str == webrtc::MediaStreamTrackInterface::kVideoKind) {
-    return MEDIA_TYPE_VIDEO;
-  } else if (type_str == kMediaTypeData) {
-    return MEDIA_TYPE_DATA;
-  }
-  FATAL();
-  // Not reachable; avoids compile warning.
-  return static_cast<MediaType>(-1);
-}
-
 }  // namespace cricket
diff --git a/api/media_types.h b/api/media_types.h
index 2f9e74c65f..bb61305367 100644
--- a/api/media_types.h
+++ b/api/media_types.h
@@ -23,9 +23,6 @@ namespace cricket {
 enum MediaType { MEDIA_TYPE_AUDIO, MEDIA_TYPE_VIDEO, MEDIA_TYPE_DATA };
 
 RTC_EXPORT std::string MediaTypeToString(MediaType type);
-// Aborts on invalid string. Only expected to be used on strings that are
-// guaranteed to be valid, such as MediaStreamTrackInterface::kind().
-MediaType MediaTypeFromString(const std::string& type_str);
 
 }  // namespace cricket