Have BidiRunList destructor delete runs

Source/core/rendering/RenderText.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net)
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 1094 matching lines @@
                 run.setXPos(leadWidth + currMaxWidth);
 
                 currMaxWidth += f.width(run);
                 glyphOverflow.right = 0;
                 needsWordSpacing = isSpace && !previousCharacterIsSpace && i == len - 1;
             }
             ASSERT(lastWordBoundary == i);
             lastWordBoundary++;
         }
     }
-    if (run)
-        bidiRuns.deleteRuns();
 
     if (firstGlyphLeftOverflow > 0)
         glyphOverflow.left = firstGlyphLeftOverflow;
 
     if ((needsWordSpacing && len > 1) || (ignoringSpaces && !firstWord))
         currMaxWidth += wordSpacing;
 
     m_minWidth = std::max(currMinWidth, m_minWidth);
     m_maxWidth = std::max(currMaxWidth, m_maxWidth);
 
@@ skipping 745 matching lines @@
     }
     secureTextTimer->restartWithNewText(lastTypedCharacterOffset);
 }
 
 PassRefPtr<AbstractInlineTextBox> RenderText::firstAbstractInlineTextBox()
 {
     return AbstractInlineTextBox::getOrCreate(this, m_firstTextBox);
 }
 
 } // namespace blink