Make ChunkDemuxer::SetTimestampOffset take a TimeDelta instead of double

media/filters/chunk_demuxer.h

Index: media/filters/chunk_demuxer.h
diff --git a/media/filters/chunk_demuxer.h b/media/filters/chunk_demuxer.h
index 81029ac5e24e8214c29aa1061aaa023002eedf47..792477eb4fe06dfb77535b1616629e110e653a0a 100644
--- a/media/filters/chunk_demuxer.h
+++ b/media/filters/chunk_demuxer.h
@@ -78,7 +78,7 @@ class MEDIA_EXPORT ChunkDemuxer : public Demuxer {
   // appended to the source buffer assicated with |id|. Returns true if the
   // offset is set properly, false if the offset cannot be applied because we're
   // in the middle of parsing a media segment.
-  bool SetTimestampOffset(const std::string& id, double offset);
+  bool SetTimestampOffset(const std::string& id, base::TimeDelta offset);
 
   // Signals an EndOfStream request.
   // Returns false if called in an unexpected state or if there is a gap between