Move global function lowestEditableAncestor() to local function in VisibleSelection.cpp

Source/core/editing/EditingUtilities.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 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 228 matching lines @@
     }
 
     return highestRoot;
 }
 
 ContainerNode* highestEditableRoot(const PositionInComposedTree& position, EditableType editableType)
 {
     return highestEditableRoot(toPositionInDOMTree(position), editableType);
 }
 
-Element* lowestEditableAncestor(Node* node)
-{
-    while (node) {
-        if (node->hasEditableStyle())
-            return node->rootEditableElement();
-        if (isHTMLBodyElement(*node))
-            break;
-        node = node->parentNode();
-    }
-
-    return 0;
-}
-
 bool isEditablePosition(const Position& p, EditableType editableType, EUpdateStyle updateStyle)
 {
     Node* node = p.parentAnchoredEquivalent().anchorNode();
     if (!node)
         return false;
     if (updateStyle == UpdateStyle)
         node->document().updateLayoutIgnorePendingStylesheets();
     else
         ASSERT(updateStyle == DoNotUpdateStyle);
 
@@ skipping 1326 matching lines @@
     // if the selection starts just before a paragraph break, skip over it
     if (isEndOfParagraph(visiblePosition))
         return mostForwardCaretPosition(visiblePosition.next().deepEquivalent());
 
     // otherwise, make sure to be at the start of the first selected node,
     // instead of possibly at the end of the last node before the selection
     return mostForwardCaretPosition(visiblePosition.deepEquivalent());
 }
 
 } // namespace blink