diff --git a/packager/media/base/media_handler.h b/packager/media/base/media_handler.h
index 92997148a6..0074dbc6b8 100644
--- a/packager/media/base/media_handler.h
+++ b/packager/media/base/media_handler.h
@@ -21,17 +21,12 @@ namespace media {
 
 enum class StreamDataType {
   kUnknown,
-  kPeriodInfo,
   kStreamInfo,
   kMediaSample,
   kTextSample,
-  kMediaEvent,
   kSegmentInfo,
 };
 
-// TODO(kqyang): Define these structures.
-struct PeriodInfo {};
-struct MediaEvent {};
 struct SegmentInfo {
   bool is_subsegment = false;
   bool is_encrypted = false;
@@ -48,22 +43,11 @@ struct StreamData {
   size_t stream_index = static_cast<size_t>(-1);
   StreamDataType stream_data_type = StreamDataType::kUnknown;
 
-  std::shared_ptr<const PeriodInfo> period_info;
   std::shared_ptr<const StreamInfo> stream_info;
   std::shared_ptr<const MediaSample> media_sample;
   std::shared_ptr<const TextSample> text_sample;
-  std::shared_ptr<const MediaEvent> media_event;
   std::shared_ptr<const SegmentInfo> segment_info;
 
-  static std::unique_ptr<StreamData> FromPeriodInfo(
-      size_t stream_index, std::shared_ptr<const PeriodInfo> period_info) {
-    std::unique_ptr<StreamData> stream_data(new StreamData);
-    stream_data->stream_index = stream_index;
-    stream_data->stream_data_type = StreamDataType::kPeriodInfo;
-    stream_data->period_info = std::move(period_info);
-    return stream_data;
-  }
-
   static std::unique_ptr<StreamData> FromStreamInfo(
       size_t stream_index, std::shared_ptr<const StreamInfo> stream_info) {
     std::unique_ptr<StreamData> stream_data(new StreamData);
@@ -91,15 +75,6 @@ struct StreamData {
     return stream_data;
   }
 
-  static std::unique_ptr<StreamData> FromMediaEvent(
-      size_t stream_index, std::shared_ptr<const MediaEvent> media_event) {
-    std::unique_ptr<StreamData> stream_data(new StreamData);
-    stream_data->stream_index = stream_index;
-    stream_data->stream_data_type = StreamDataType::kMediaEvent;
-    stream_data->media_event = std::move(media_event);
-    return stream_data;
-  }
-
   static std::unique_ptr<StreamData> FromSegmentInfo(
       size_t stream_index, std::shared_ptr<const SegmentInfo> segment_info) {
     std::unique_ptr<StreamData> stream_data(new StreamData);
@@ -167,12 +142,6 @@ class MediaHandler {
   /// stream_data.stream_index should be the output stream index.
   Status Dispatch(std::unique_ptr<StreamData> stream_data);
 
-  /// Dispatch the period info to downstream handlers.
-  Status DispatchPeriodInfo(
-      size_t stream_index, std::shared_ptr<const PeriodInfo> period_info) {
-    return Dispatch(StreamData::FromPeriodInfo(stream_index, period_info));
-  }
-
   /// Dispatch the stream info to downstream handlers.
   Status DispatchStreamInfo(
       size_t stream_index, std::shared_ptr<const StreamInfo> stream_info) {
@@ -192,12 +161,6 @@ class MediaHandler {
     return Dispatch(StreamData::FromTextSample(stream_index, text_sample));
   }
 
-  /// Dispatch the media event to downstream handlers.
-  Status DispatchMediaEvent(
-      size_t stream_index, std::shared_ptr<const MediaEvent> media_event) {
-    return Dispatch(StreamData::FromMediaEvent(stream_index, media_event));
-  }
-
   /// Dispatch the segment info to downstream handlers.
   Status DispatchSegmentInfo(
       size_t stream_index, std::shared_ptr<const SegmentInfo> segment_info) {