Refactor LayoutInline::addOutlineRects to avoid tricky logic to avoid dups

Source/core/layout/LayoutInline.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 69 matching lines @@
     InlineBox* lastLineBoxIncludingCulling() const { return alwaysCreateLineBoxes() ? lastLineBox() : culledInlineLastLineBox(); }
 
     LayoutBoxModelObject* virtualContinuation() const final { return continuation(); }
     LayoutInline* inlineElementContinuation() const;
 
     void updateDragState(bool dragOn) final;
 
     LayoutSize offsetForInFlowPositionedInline(const LayoutBox& child) const;
 
     void addOutlineRects(Vector<LayoutRect>&, const LayoutPoint& additionalOffset) const final;
+    // The following methods are called from the container if it has already added outline rects for line boxes
+    // and/or children of this LayoutInline.
+    void addOutlineRectsForChildrenAndContinuations(Vector<LayoutRect>&, const LayoutPoint& additionalOffset) const;
+    void addOutlineRectsForContinuations(Vector<LayoutRect>&, const LayoutPoint& additionalOffset) const;
 
     using LayoutBoxModelObject::continuation;
     using LayoutBoxModelObject::setContinuation;
 
     bool alwaysCreateLineBoxes() const { return alwaysCreateLineBoxesForLayoutInline(); }
     void setAlwaysCreateLineBoxes(bool alwaysCreateLineBoxes = true) { setAlwaysCreateLineBoxesForLayoutInline(alwaysCreateLineBoxes); }
     void updateAlwaysCreateLineBoxes(bool fullLayout);
 
     LayoutRect localCaretRect(InlineBox*, int, LayoutUnit* extraWidthToEndOfLine) final;
 
@@ skipping 92 matching lines @@
 
     LayoutObjectChildList m_children;
     LineBoxList m_lineBoxes; // All of the line boxes created for this inline flow.  For example, <i>Hello<br>world.</i> will have two <i> line boxes.
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutInline, isLayoutInline());
 
 } // namespace blink
 
 #endif // LayoutInline_h