Clear active splice flag after an explicit Reset().

media/filters/fake_demuxer_stream.cc

Index: media/filters/fake_demuxer_stream.cc
diff --git a/media/filters/fake_demuxer_stream.cc b/media/filters/fake_demuxer_stream.cc
index 026b7602f3d92281a8715334729c68a49d7cde7f..78386e3b046e27c690a3c589a848eee2c5ea8d13 100644
--- a/media/filters/fake_demuxer_stream.cc
+++ b/media/filters/fake_demuxer_stream.cc
@@ -54,6 +54,7 @@ void FakeDemuxerStream::Initialize() {
   num_buffers_returned_ = 0;
   current_timestamp_ = base::TimeDelta::FromMilliseconds(kStartTimestampMs);
   duration_ = base::TimeDelta::FromMilliseconds(kDurationMs);
+  splice_timestamp_ = kNoTimestamp();
   next_coded_size_ = gfx::Size(kStartWidth, kStartHeight);
   next_read_num_ = 0;
 }
@@ -180,6 +181,7 @@ void FakeDemuxerStream::DoRead() {
   }
   buffer->set_timestamp(current_timestamp_);
   buffer->set_duration(duration_);
+  buffer->set_splice_timestamp(splice_timestamp_);
   current_timestamp_ += duration_;
 
   num_buffers_left_in_current_config_--;