Minimize RenderObject* casting to RenderText*

Source/core/editing/HTMLInterchange.cpp

 /*
  * Copyright (C) 2004, 2008 Apple 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:
  * 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 11 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/editing/HTMLInterchange.h"
 
 #include "core/dom/Text.h"
 #include "core/editing/htmlediting.h"
 #include "core/rendering/RenderObject.h"
+#include "core/rendering/RenderText.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/unicode/CharacterNames.h"
 
 namespace blink {
 
 String convertHTMLTextToInterchangeFormat(const String& in, const Text& node)
 {
     // Assume all the text comes from node.
     if (node.renderer() && node.renderer()->style()->preserveNewline())
         return in;
@@ skipping 48 matching lines @@
             }
         } else
             s.append(in[i]);
         i += consumed;
     }
 
     return s.toString();
 }
 
 } // namespace blink