Always notify the MediaPlayer of any seek.

LayoutTests/media/video-seek-to-current-position-expected.txt

Index: LayoutTests/media/video-seek-to-current-position-expected.txt
diff --git a/LayoutTests/media/video-seek-to-current-position-expected.txt b/LayoutTests/media/video-seek-to-current-position-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..59de628e31f190f87d9b54d14097afd797c9cc0e
--- /dev/null
+++ b/LayoutTests/media/video-seek-to-current-position-expected.txt
@@ -0,0 +1,29 @@
+Test that seeking attribute is true immediately after a seek to the current position, and goes back to false when the seek completes.
+
+EVENT(loadedmetadata)
+RUN(video.currentTime = seekTime)
+EXPECTED (video.seeking == 'true') OK
+
+EVENT(seeking)
+EVENT(seeked)
+
+EXPECTED (video.seeking == 'false') OK
+EXPECTED (video.currentTime == '1') OK
+RUN(video.currentTime = seekTime)
+EXPECTED (video.seeking == 'true') OK
+
+EVENT(seeking)
+EVENT(seeked)
+
+EXPECTED (video.seeking == 'false') OK
+EXPECTED (video.currentTime == '1') OK
+RUN(video.currentTime = seekTime)
+EXPECTED (video.seeking == 'true') OK
+
+EVENT(seeking)
+EVENT(seeked)
+
+EXPECTED (video.seeking == 'false') OK
+EXPECTED (video.currentTime == '1') OK
+END OF TEST
+