Media Controls: Fix seek to end when max attr is rounded up

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 752 matching lines @@
     mediaControls().endScrubbing();
   }
 
   MediaControlInputElement::defaultEventHandler(event);
 
   if (event->type() != EventTypeNames::input)
     return;
 
   double time = value().toDouble();
 
+  double duration = mediaElement().duration();
+  // Workaround for floating point error - it's possible for this element's max
+  // 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();
 }
 
@@ skipping 263 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