Sync VTTCue.align/vertical with spec

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 246 matching lines @@
     case VerticalGrowingLeft:
         return verticalGrowingLeftKeyword();
     case VerticalGrowingRight:
         return verticalGrowingRightKeyword();
     default:
         ASSERT_NOT_REACHED();
         return emptyString();
     }
 }
 
-void VTTCue::setVertical(const String& value, ExceptionState& exceptionState)
+void VTTCue::setVertical(const String& value)
 {
-    // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#dom-texttrackcue-vertical
-    // On setting, the text track cue writing direction must be set to the value given
-    // in the first cell of the row in the table above whose second cell is a
-    // case-sensitive match for the new value, if any. If none of the values match, then
-    // the user agent must instead throw a SyntaxError exception.
-
     WritingDirection direction = m_writingDirection;
     if (value == horizontalKeyword())
         direction = Horizontal;
     else if (value == verticalGrowingLeftKeyword())
         direction = VerticalGrowingLeft;
     else if (value == verticalGrowingRightKeyword())
         direction = VerticalGrowingRight;
     else
-        exceptionState.throwDOMException(SyntaxError, "The value provided ('" + value + "') is invalid. Only 'rl', 'lr', and the empty string are accepted.");
+        ASSERT_NOT_REACHED();
 
     if (direction == m_writingDirection)
         return;
 
     cueWillChange();
     m_writingDirection = direction;
     cueDidChange();
 }
 
 void VTTCue::setSnapToLines(bool value)
@@ skipping 72 matching lines @@
     case Left:
         return leftKeyword();
     case Right:
         return rightKeyword();
     default:
         ASSERT_NOT_REACHED();
         return emptyString();
     }
 }
 
-void VTTCue::setAlign(const String& value, ExceptionState& exceptionState)
+void VTTCue::setAlign(const String& value)
 {
-    // http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html#dom-texttrackcue-align
-    // On setting, the text track cue alignment must be set to the value given in the
-    // first cell of the row in the table above whose second cell is a case-sensitive
-    // match for the new value, if any. If none of the values match, then the user
-    // agent must instead throw a SyntaxError exception.
-
     CueAlignment alignment = m_cueAlignment;
     if (value == startKeyword())
         alignment = Start;
     else if (value == middleKeyword())
         alignment = Middle;
     else if (value == endKeyword())
         alignment = End;
     else if (value == leftKeyword())
         alignment = Left;
     else if (value == rightKeyword())
         alignment = Right;
     else
-        exceptionState.throwDOMException(SyntaxError, "The value provided ('" + value + "') is invalid. Only 'start', 'middle', 'end', 'left', and 'right' are accepted.");
+        ASSERT_NOT_REACHED();
 
     if (alignment == m_cueAlignment)
         return;
 
     cueWillChange();
     m_cueAlignment = alignment;
     cueDidChange();
 }
 
 void VTTCue::setText(const String& text)
@@ skipping 667 matching lines @@
     ASSERT(m_cueBackgroundBox);
     return m_cueBackgroundBox->document();
 }
 
 void VTTCue::trace(Visitor* visitor)
 {
     TextTrackCue::trace(visitor);
 }
 
 } // namespace WebCore