[Editing][CodeHealth] Make Node::rootEditableElement static

third_party/WebKit/Source/core/editing/VisibleUnits.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 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 1318 matching lines @@
         LineLayoutItem lineLayoutItem = root->closestLeafChildForPoint(pointInLine, isEditablePosition(p, ContentIsEditable))->getLineLayoutItem();
         Node* node = lineLayoutItem.node();
         if (node && editingIgnoresContent(node))
             return VisiblePosition::inParentBeforeNode(*node);
         return createVisiblePosition(lineLayoutItem.positionForPoint(pointInLine));
     }
 
     // Could not find a previous line. This means we must already be on the first line.
     // Move to the start of the content in this block, which effectively moves us
     // to the start of the line we're on.
-    Element* rootElement = node->hasEditableStyle(editableType) ? node->rootEditableElement(editableType) : node->document().documentElement();
+    Element* rootElement = node->hasEditableStyle(editableType) ? rootEditableElement(*node, editableType) : node->document().documentElement();
     if (!rootElement)
         return VisiblePosition();
     return VisiblePosition::firstPositionInNode(rootElement);
 }
 
 VisiblePosition nextLinePosition(const VisiblePosition& visiblePosition, LayoutUnit lineDirectionPoint, EditableType editableType)
 {
     Position p = visiblePosition.deepEquivalent();
     Node* node = p.anchorNode();
 
@@ skipping 35 matching lines @@
         LineLayoutItem lineLayoutItem = root->closestLeafChildForPoint(pointInLine, isEditablePosition(p))->getLineLayoutItem();
         Node* node = lineLayoutItem.node();
         if (node && editingIgnoresContent(node))
             return VisiblePosition::inParentBeforeNode(*node);
         return createVisiblePosition(lineLayoutItem.positionForPoint(pointInLine));
     }
 
     // Could not find a next line. This means we must already be on the last line.
     // Move to the end of the content in this block, which effectively moves us
     // to the end of the line we're on.
-    Element* rootElement = node->hasEditableStyle(editableType) ? node->rootEditableElement(editableType) : node->document().documentElement();
+    Element* rootElement = node->hasEditableStyle(editableType) ? rootEditableElement(*node, editableType) : node->document().documentElement();
     if (!rootElement)
         return VisiblePosition();
     return VisiblePosition::lastPositionInNode(rootElement);
 }
 
 // ---------
 
 static unsigned startSentenceBoundary(const UChar* characters, unsigned length, unsigned, BoundarySearchContextAvailability, bool&)
 {
     TextBreakIterator* iterator = sentenceBreakIterator(characters, length);
@@ skipping 1846 matching lines @@
 {
     return previousPositionOfAlgorithm<EditingStrategy>(visiblePosition, rule);
 }
 
 VisiblePositionInFlatTree previousPositionOf(const VisiblePositionInFlatTree& visiblePosition, EditingBoundaryCrossingRule rule)
 {
     return previousPositionOfAlgorithm<EditingInFlatTreeStrategy>(visiblePosition, rule);
 }
 
 } // namespace blink