Have BidiRunList destructor delete runs

Source/platform/text/BidiRunList.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008 Apple Inc.  All right reserved.
  * Copyright (C) 2011 Google, Inc.  All rights 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.
  *
@@ skipping 22 matching lines @@
     WTF_MAKE_NONCOPYABLE(BidiRunList);
 public:
     BidiRunList()
         : m_firstRun(0)
         , m_lastRun(0)
         , m_logicallyLastRun(0)
         , m_runCount(0)
     {
     }
 
-    // FIXME: Once BidiResolver no longer owns the BidiRunList,
-    // then ~BidiRunList should call deleteRuns() automatically.
+    ~BidiRunList() { deleteRuns(); }
 
     Run* firstRun() const { return m_firstRun; }
     Run* lastRun() const { return m_lastRun; }
     Run* logicallyLastRun() const { return m_logicallyLastRun; }
     unsigned runCount() const { return m_runCount; }
 
     void addRun(Run*);
     void prependRun(Run*);
 
     void moveRunToEnd(Run*);
@@ skipping 189 matching lines @@
         m_firstRun = endRun;
 
     startRun->m_next = afterEnd;
     if (!afterEnd)
         m_lastRun = startRun;
 }
 
 } // namespace blink
 
 #endif // BidiRunList