Invalid caret at the end of line in overtype mode

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 878 matching lines @@
 bool isStartOfLine(const VisiblePosition &p)
 {
     return p.isNotNull() && p == startOfLine(p);
 }
 
 bool isEndOfLine(const VisiblePosition &p)
 {
     return p.isNotNull() && p == endOfLine(p);
 }
 
+bool isLogicalEndOfLine(const VisiblePosition &p)
+{
+    return p.isNotNull() && p == logicalEndOfLine(p);
+}
+
 static inline IntPoint absoluteLineDirectionPointToLocalPointInBlock(RootInlineBox* root, int lineDirectionPoint)
 {
     ASSERT(root);
     RenderBlockFlow& containingBlock = root->block();
     FloatPoint absoluteBlockPoint = containingBlock.localToAbsolute(FloatPoint());
     if (containingBlock.hasOverflowClip())
         absoluteBlockPoint -= containingBlock.scrolledContentOffset();
 
     if (root->block().isHorizontalWritingMode())
         return IntPoint(lineDirectionPoint - absoluteBlockPoint.x(), root->blockDirectionPointInLine());
@@ skipping 471 matching lines @@
 {
     return direction == LTR ? logicalStartOfLine(c) : logicalEndOfLine(c);
 }
 
 VisiblePosition rightBoundaryOfLine(const VisiblePosition& c, TextDirection direction)
 {
     return direction == LTR ? logicalEndOfLine(c) : logicalStartOfLine(c);
 }
 
 }