Avoid creating first-letter RenderTextFragments for unsuitable text nodes

Source/core/rendering/RenderBlock.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple 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 558 matching lines @@
     BidiRun* handleTrailingSpaces(BidiRunList<BidiRun>&, BidiContext*);
 
     void insertIntoTrackedRendererMaps(RenderBox* descendant, TrackedDescendantsMap*&, TrackedContainerMap*&);
     static void removeFromTrackedRendererMaps(RenderBox* descendant, TrackedDescendantsMap*&, TrackedContainerMap*&);
 
     virtual RootInlineBox* createRootInlineBox(); // Subclassed by SVG and Ruby.
 
     // Called to lay out the legend for a fieldset or the ruby text of a ruby run.
     virtual RenderObject* layoutSpecialExcludedChild(bool /*relayoutChildren*/, SubtreeLayoutScope&) { return 0; }
 
-    void createFirstLetterRenderer(RenderObject* firstLetterBlock, RenderObject* currentChild);
+    void createFirstLetterRenderer(RenderObject* firstLetterBlock, RenderObject* currentChild, unsigned length);
     void updateFirstLetterStyle(RenderObject* firstLetterBlock, RenderObject* firstLetterContainer);
 
     Node* nodeForHitTest() const;
 
     struct FloatWithRect {
         FloatWithRect(RenderBox* f)
             : object(f)
             , rect(LayoutRect(f->x() - f->marginLeft(), f->y() - f->marginTop(), f->width() + f->marginWidth(), f->height() + f->marginHeight()))
             , everHadLayout(f->everHadLayout())
         {
@@ skipping 295 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isRenderBlock());
     return static_cast<const RenderBlock*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderBlock(const RenderBlock*);
 
 } // namespace WebCore
 
 #endif // RenderBlock_h