VTTCue: Don't compare m_displayPosition against undefinedPosition

Source/core/html/track/vtt/VTTCue.cpp

 /*
  * Copyright (c) 2013, Opera Software ASA. 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 646 matching lines @@
         }
     }
 
     // A text track cue has a text track cue computed line position whose value
     // is defined in terms of the other aspects of the cue.
     m_computedLinePosition = calculateComputedLinePosition();
 
     // 10.9 Determine the value of whichever of x-position or y-position is not
     // yet calculated for cue as per the appropriate rules from the following
     // list:
-    if (m_snapToLines && m_displayPosition.second == undefinedPosition && m_writingDirection == Horizontal)
+    if (m_snapToLines && m_writingDirection == Horizontal)
         m_displayPosition.second = 0;
 
-    if (!m_snapToLines && m_displayPosition.second == undefinedPosition && m_writingDirection == Horizontal)
+    if (!m_snapToLines && m_writingDirection == Horizontal)
         m_displayPosition.second = m_computedLinePosition;
 
-    if (m_snapToLines && m_displayPosition.first == undefinedPosition
-        && (m_writingDirection == VerticalGrowingLeft || m_writingDirection == VerticalGrowingRight))
+    if (m_snapToLines && (m_writingDirection == VerticalGrowingLeft || m_writingDirection == VerticalGrowingRight))
         m_displayPosition.first = 0;
 
     if (!m_snapToLines && (m_writingDirection == VerticalGrowingLeft || m_writingDirection == VerticalGrowingRight))
         m_displayPosition.first = m_computedLinePosition;
 }
 
 void VTTCue::markFutureAndPastNodes(ContainerNode* root, double previousTimestamp, double movieTime)
 {
     DEFINE_STATIC_LOCAL(const String, timestampTag, ("timestamp"));
 
@@ skipping 420 matching lines @@
 
 void VTTCue::trace(Visitor* visitor)
 {
     visitor->trace(m_vttNodeTree);
     visitor->trace(m_cueBackgroundBox);
     visitor->trace(m_displayTree);
     TextTrackCue::trace(visitor);
 }
 
 } // namespace blink