Fixes play seek when user sets loop after ended.

LayoutTests/media/video-loop-expected.txt

Index: LayoutTests/media/video-loop-expected.txt
diff --git a/LayoutTests/media/video-loop-expected.txt b/LayoutTests/media/video-loop-expected.txt
index 2e5fa758000e390c2a127da59b7d005fb2672745..396ffc55f95a3fe1db4b113497aba91452a030dc 100644
--- a/LayoutTests/media/video-loop-expected.txt
+++ b/LayoutTests/media/video-loop-expected.txt
@@ -4,6 +4,8 @@ Play to end with 'loop' set to true.
 When 'seeked' event fires, verify that time has jumped back and movie is playing.
 Set 'loop' to false and play again.
 Verify that 'ended' event fires.
+Set 'loop' to true now that video is ended. Call play again.
+Verify 'seeked' event fires, verify that time has jumped back and movie is playing.
 ++ Test setting/removing the attribute.
 EXPECTED (video.getAttribute('loop') == 'null') OK
 EXPECTED (video.loop == 'false') OK
@@ -46,7 +48,7 @@ RUN(video.currentTime = video.duration - 0.4)
 EVENT(pause)
 EVENT(seeked)
 
-++ third seek completed, beginning playback for the last time.
+++ third seek completed, unset 'loop' and let play to the end.
 EXPECTED (video.paused == 'true') OK
 EXPECTED (video.ended == 'false') OK
 RUN(video.play())
@@ -59,5 +61,26 @@ EVENT(ended)
 EXPECTED (video.ended == 'true') OK
 EXPECTED (mediaElement.currentTime == 'mediaElement.duration') OK
 
+++ with ended == true, set 'loop' attribute. This will cause ended == false; looping video cannot be 'ended', only paused.
+EXPECTED (video.loop == 'false') OK
+EXPECTED (video.paused == 'true') OK
+RUN(video.loop = true)
+EXPECTED (video.loop == 'true') OK
+EXPECTED (video.ended == 'false') OK
+EXPECTED (video.paused == 'true') OK
+RUN(video.play())
+
+EVENT(play)
+EVENT(seeked)
+
+++ fourth seek completed.
+EXPECTED (mediaElement.currentTime < 'mediaElement.duration') OK
+EXPECTED (video.loop == 'true') OK
+EXPECTED (video.paused == 'false') OK
+EXPECTED (video.ended == 'false') OK
+
+++ Pausing now that test is over to prevent additional unwanted looping.
+RUN(video.pause())
+
 END OF TEST