Use tighter typing in editing: VisiblePosition & VisibleSelection

Source/core/dom/PositionIterator.cpp

 /*
  * Copyright (C) 2007, 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 153 matching lines @@
     }
     if (renderer->isText())
         return !Position::nodeIsUserSelectNone(m_anchorNode) && Position(*this).inRenderedText();
 
     if (renderer->isSVG()) {
         // We don't consider SVG elements are contenteditable except for
         // associated renderer returns isText() true, e.g. RenderSVGInlineText.
         return false;
     }
 
-    if (isRenderedTableElement(m_anchorNode) || editingIgnoresContent(m_anchorNode))
+    if (isRenderedHTMLTableElement(m_anchorNode) || editingIgnoresContent(m_anchorNode))
         return (atStartOfNode() || atEndOfNode()) && !Position::nodeIsUserSelectNone(m_anchorNode->parentNode());
 
     if (!isHTMLHtmlElement(*m_anchorNode) && renderer->isRenderBlockFlow()) {
         if (toRenderBlock(renderer)->logicalHeight() || isHTMLBodyElement(*m_anchorNode)) {
             if (!Position::hasRenderedNonAnonymousDescendantsWithHeight(renderer))
                 return atStartOfNode() && !Position::nodeIsUserSelectNone(m_anchorNode);
             return m_anchorNode->hasEditableStyle() && !Position::nodeIsUserSelectNone(m_anchorNode) && Position(*this).atEditingBoundary();
         }
     }
 
     return false;
 }
 
 } // namespace blink