[Line Layout API] Convert AbstractInlineTextBox to new line layout API

third_party/WebKit/Source/core/layout/api/LineLayoutSVGInlineText.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef LineLayoutSVGInlineText_h
 #define LineLayoutSVGInlineText_h
 
 #include "core/layout/api/LineLayoutText.h"
 #include "core/layout/svg/LayoutSVGInlineText.h"
 
 namespace blink {
 
 class LineLayoutSVGInlineText : public LineLayoutText {
 public:
     explicit LineLayoutSVGInlineText(LayoutSVGInlineText* layoutSVGInlineText)
         : LineLayoutText(layoutSVGInlineText)
     {
     }
 
     explicit LineLayoutSVGInlineText(const LineLayoutItem& item)
         : LineLayoutText(item)
     {
         ASSERT(!item || item.isSVGInlineText());
     }
 
+    LineLayoutSVGInlineText(std::nullptr_t) : LineLayoutText(nullptr) { }
+
     LineLayoutSVGInlineText() { }
 
     SVGTextLayoutAttributes* layoutAttributes() const
     {
         return const_cast<SVGTextLayoutAttributes*>(toSVGInlineText()->layoutAttributes());
     }
 
     bool characterStartsNewTextChunk(int position) const
     {
         return toSVGInlineText()->characterStartsNewTextChunk(position);
@@ skipping 71 matching lines @@
     }
 
     LineLayoutSVGInlineText* m_textLineLayout;
     unsigned m_metricsListOffset;
     unsigned m_characterOffset;
 };
 
 } // namespace blink
 
 #endif // LineLayoutSVGInlineText_h