Video Player: Call video element's load method on loading video file.

ui/file_manager/video_player/js/media_controls.js

Index: ui/file_manager/video_player/js/media_controls.js
diff --git a/ui/file_manager/video_player/js/media_controls.js b/ui/file_manager/video_player/js/media_controls.js
index 33745c75cf678e65c5036b96762e535210ce3e6b..77aa508f9f5f29aa107c964253c66867a99d00d5 100644
--- a/ui/file_manager/video_player/js/media_controls.js
+++ b/ui/file_manager/video_player/js/media_controls.js
@@ -619,7 +619,7 @@ MediaControls.prototype.attachMedia = function(mediaElement) {
     /* Copy the user selected volume to the new media element. */
     this.savedVolume_ = this.media_.volume = this.volume_.ratio;
   }
-  if (this.media_.textTracks.length > 0) {
+  if (this.media_.textTracks && this.media_.textTracks.length > 0) {

[yawano, 2016/03/29 08:29:23]

Very small optional nit: I don't think we need to check this here. As far as I
check the W3C specification, textTracks won't be null. -
https://www.w3.org/TR/2011/WD-html5-20110405/video.html#media-elements

[fukino, 2016/03/29 08:48:28]

If the media is CastVideoElement, the textTracks is undefined.
Maybe we should add textTracks property to CastVideoElement?

[yawano, 2016/03/29 08:59:14]

I get it. Thank you!

No, I don't think we need to add the property. It might make the element
consistent with the native VideoElement, but I think this check is okay for now.

     this.attachTextTrack_(this.media_.textTracks[0]);
   } else {
     this.attachTextTrack_(null);