Move SelectionState out of LayoutObject and into Line Layout API

Source/core/layout/line/InlineBox.cpp

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2007 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 276 matching lines @@
     InlineBox* leaf = nextLeafChild();
     return (leaf && leaf->isLineBreak()) ? nullptr : leaf;
 }
 
 InlineBox* InlineBox::prevLeafChildIgnoringLineBreak() const
 {
     InlineBox* leaf = prevLeafChild();
     return (leaf && leaf->isLineBreak()) ? nullptr : leaf;
 }
 
-LayoutObject::SelectionState InlineBox::selectionState() const
+SelectionState InlineBox::selectionState() const
 {
     return layoutObject().selectionState();
 }
 
 bool InlineBox::canAccommodateEllipsis(bool ltr, int blockEdge, int ellipsisWidth) const
 {
     // Non-replaced elements can always accommodate an ellipsis.
     if (!layoutObject().isReplaced())
         return true;
 
@@ skipping 87 matching lines @@
 
 void showLineTree(const blink::InlineBox* b)
 {
     if (b)
         b->showLineTreeForThis();
     else
         fprintf(stderr, "Cannot showLineTree for (nil) InlineBox.\n");
 }
 
 #endif