Media Controls timeline: immediately update current time display

third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp

 /*
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 764 matching lines @@
   // attribute to be rounded to a value slightly higher than the duration. If
   // this happens and scrubber is dragged near the max, seek to duration.
   if (time > duration)
     time = duration;
 
   // FIXME: This will need to take the timeline offset into consideration
   // once that concept is supported, see https://crbug.com/312699
   if (mediaElement().seekable()->contain(time))
     mediaElement().setCurrentTime(time);
 
-  LayoutSliderItem slider = LayoutSliderItem(toLayoutSlider(layoutObject()));
-  if (!slider.isNull() && slider.inDragMode())
-    mediaControls().updateCurrentTimeDisplay();
+  // Provide immediate feedback (without waiting for media to seek) to make it
+  // easier for user to seek to a precise time.
+  mediaControls().updateCurrentTimeDisplay();
 }
 
 bool MediaControlTimelineElement::willRespondToMouseClickEvents() {
   return isConnected() && document().isActive();
 }
 
 void MediaControlTimelineElement::setPosition(double currentTime) {
   setValue(String::number(currentTime));
 
   if (LayoutObject* layoutObject = this->layoutObject())
@@ skipping 255 matching lines @@
 MediaControlCurrentTimeDisplayElement*
 MediaControlCurrentTimeDisplayElement::create(MediaControls& mediaControls) {
   MediaControlCurrentTimeDisplayElement* element =
       new MediaControlCurrentTimeDisplayElement(mediaControls);
   element->setShadowPseudoId(
       AtomicString("-webkit-media-controls-current-time-display"));
   return element;
 }
 
 }  // namespace blink