Fake Bidi run does not need to be always created

Source/platform/text/BidiResolver.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008 Apple Inc.  All right reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 101 matching lines @@
     return !(status1 == status2);
 }
 
 struct BidiCharacterRun {
     BidiCharacterRun(int start, int stop, BidiContext* context, WTF::Unicode::Direction dir)
         : m_override(context->override())
         , m_next(0)
         , m_start(start)
         , m_stop(stop)
     {
+        ASSERT(m_start <= m_stop);
         if (dir == WTF::Unicode::OtherNeutral)
             dir = context->dir();
 
         m_level = context->level();
 
         // add level of run (cases I1 & I2)
         if (m_level % 2) {
             if (dir == WTF::Unicode::LeftToRight || dir == WTF::Unicode::ArabicNumber || dir == WTF::Unicode::EuropeanNumber)
                 m_level++;
         } else {
@@ skipping 840 matching lines @@
 template<class Iterator, class Run>
 MidpointState<Iterator> BidiResolver<Iterator, Run>::midpointStateForIsolatedRun(Run* run)
 {
     return m_midpointStateForIsolatedRun.take(run);
 }
 
 
 } // namespace WebCore
 
 #endif // BidiResolver_h