Move parentEditingBoundary() to VisibileUnits.cpp from Position.cpp.

Source/core/editing/Position.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 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 445 matching lines @@
 
     PositionAlgorithm<Strategy> prevPosition = positions.upstream(CanCrossEditingBoundary);
     if (positions.atLastEditingPositionForNode() && prevPosition.isNotNull() && !prevPosition.anchorNode()->hasEditableStyle())
         return true;
 
     return nextPosition.isNotNull() && !nextPosition.anchorNode()->hasEditableStyle()
         && prevPosition.isNotNull() && !prevPosition.anchorNode()->hasEditableStyle();
 }
 
 template <typename Strategy>
-static ContainerNode* nonShadowBoundaryParentNode(Node* node)
-{
-    ContainerNode* parent = Strategy::parent(*node);
-    return parent && !parent->isShadowRoot() ? parent : nullptr;
-}
-
-template <typename Strategy>
-static Node* parentEditingBoundaryAlgorithm(const PositionAlgorithm<Strategy>& position)
-{
-    Node* const anchorNode = position.anchorNode();
-    if (!anchorNode)
-        return nullptr;
-
-    Node* documentElement = anchorNode->document().documentElement();
-    if (!documentElement)
-        return nullptr;
-
-    Node* boundary = position.computeContainerNode();
-    while (boundary != documentElement && nonShadowBoundaryParentNode<Strategy>(boundary) && anchorNode->hasEditableStyle() == Strategy::parent(*boundary)->hasEditableStyle())
-        boundary = nonShadowBoundaryParentNode<Strategy>(boundary);
-
-    return boundary;
-}
-
-Node* parentEditingBoundary(const Position& position)
-{
-    return parentEditingBoundaryAlgorithm<EditingStrategy>(position);
-}
-
-Node* parentEditingBoundary(const PositionInComposedTree& position)
-{
-    return parentEditingBoundaryAlgorithm<EditingInComposedTreeStrategy>(position);
-}
-
-template <typename Strategy>
 bool PositionAlgorithm<Strategy>::atStartOfTree() const
 {
     if (isNull())
         return true;
     return !Strategy::parent(*anchorNode()) && m_offset == 0;
 }
 
 template <typename Strategy>
 bool PositionAlgorithm<Strategy>::atEndOfTree() const
 {
@@ skipping 513 matching lines @@
 
 void showTree(const blink::Position* pos)
 {
     if (pos)
         pos->showTreeForThis();
     else
         fprintf(stderr, "Cannot showTree for (nil)\n");
 }
 
 #endif