VTTCue: Remove dead exception throwing code in setLine/setPosition

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 310 matching lines @@
 }
 
 void VTTCue::line(DoubleOrAutoKeyword& result) const
 {
     if (lineIsAuto())
         result.setAutoKeyword(autoKeyword());
     else
         result.setDouble(m_linePosition);
 }
 
-void VTTCue::setLine(const DoubleOrAutoKeyword& position, ExceptionState& exceptionState)
+void VTTCue::setLine(const DoubleOrAutoKeyword& position)
 {
-    // FIXME: Expecting bindings code to handle this case: https://crbug.com/450252.
-    if (position.isDouble() && !std::isfinite(position.getAsDouble())) {
-        exceptionState.throwTypeError("The provided double value is non-finite.");
-        return;
-    }
-
     // http://dev.w3.org/html5/webvtt/#dfn-vttcue-line
     // On setting, the text track cue line position must be set to the new
     // value; if the new value is the string "auto", then it must be
     // interpreted as the special value auto.
     // ("auto" is translated to NaN.)
     float floatPosition;
     if (position.isAutoKeyword()) {
         if (lineIsAuto())
             return;
         floatPosition = std::numeric_limits<float>::quiet_NaN();
@@ skipping 18 matching lines @@
 void VTTCue::position(DoubleOrAutoKeyword& result) const
 {
     if (textPositionIsAuto())
         result.setAutoKeyword(autoKeyword());
     else
         result.setDouble(m_textPosition);
 }
 
 void VTTCue::setPosition(const DoubleOrAutoKeyword& position, ExceptionState& exceptionState)
 {
-    // FIXME: Expecting bindings code to handle this case: https://crbug.com/450252.
-    if (position.isDouble() && !std::isfinite(position.getAsDouble())) {
-        exceptionState.throwTypeError("The provided double value is non-finite.");
-        return;
-    }
-
     // http://dev.w3.org/html5/webvtt/#dfn-vttcue-position
     // On setting, if the new value is negative or greater than 100, then an
     // IndexSizeError exception must be thrown. Otherwise, the text track cue
     // text position must be set to the new value; if the new value is the
     // string "auto", then it must be interpreted as the special value auto.
     float floatPosition;
     if (position.isAutoKeyword()) {
         if (textPositionIsAuto())
             return;
         floatPosition = std::numeric_limits<float>::quiet_NaN();
@@ skipping 796 matching lines @@
 
 void VTTCue::trace(Visitor* visitor)
 {
     visitor->trace(m_vttNodeTree);
     visitor->trace(m_cueBackgroundBox);
     visitor->trace(m_displayTree);
     TextTrackCue::trace(visitor);
 }
 
 } // namespace blink