MSE: Log a warning if muxed AV media segment has no A or has no V block

media/formats/common/stream_parser_test_base.h

Index: media/formats/common/stream_parser_test_base.h
diff --git a/media/formats/common/stream_parser_test_base.h b/media/formats/common/stream_parser_test_base.h
index 42cb8d1bc7dbe4b9ea41a4ec9cdadcfd6c803265..24fcce3d20e5c81d42905e0d95a7e57e091d0106 100644
--- a/media/formats/common/stream_parser_test_base.h
+++ b/media/formats/common/stream_parser_test_base.h
@@ -65,7 +65,7 @@ class StreamParserTestBase {
                     const StreamParser::TextBufferQueueMap& text_map);
   void OnKeyNeeded(EmeInitDataType type, const std::vector<uint8_t>& init_data);
   void OnNewSegment();
-  void OnEndOfSegment();
+  bool OnEndOfSegment();
 
   scoped_ptr<StreamParser> parser_;
   std::stringstream results_stream_;