Handle empty lines in the 'TimingsAndSettings' state in the WebVTTParser

Source/core/html/track/WebVTTParser.cpp

 /*
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 162 matching lines @@
             // 19-29 - Allow any number of line terminators, then initialize new cue values.
             if (line.isEmpty())
                 break;
             resetCueValues();
 
             // 30-39 - Check if this line contains an optional identifier or timing data.
             m_state = collectCueId(line);
             break;
 
         case TimingsAndSettings:
+            if (line.isEmpty()) {
+                m_state = Id;
+                break;
+            }
+
             // 40 - Collect cue timings and settings.
             m_state = collectTimingsAndSettings(line);
             break;
 
         case CueText:
             // 41-53 - Collect the cue text, create a cue, and add it to the output.
             m_state = collectCueText(line, position >= textData.length());
             break;
 
         case BadCue:
@@ skipping 368 matching lines @@
     unsigned oldPosition = *position;
     while (*position < data.length() && data[*position] != '\r' && data[*position] != '\n')
         (*position)++;
     String line = data.substring(oldPosition, *position - oldPosition);
     skipLineTerminator(data, position);
     return line;
 }
 
 }