Make nextBoundary() to use lastPositionInNode() instead of RangeBoundaryPoint::setToEndOfNode()

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 753 matching lines @@
             int i = startOfLastWordBoundaryContext(characters.data(), length);
             string.prepend(characters.data() + i, length - i);
             prefixLength += length - i;
             if (i > 0)
                 break;
             backwardsIterator.advance();
         }
     }
 
     Position searchStart = Position::editingPositionOf(start.anchorNode(), start.offsetInContainerNode());
-    RangeBoundaryPoint searchEndPoint(boundary);
-    searchEndPoint.setToEndOfNode(*boundary);
-    Position searchEnd = searchEndPoint.toPosition();
+    Position searchEnd = Position::lastPositionInNode(boundary);
     TextIterator it(searchStart, searchEnd, TextIteratorEmitsCharactersBetweenAllVisiblePositions);
     const unsigned invalidOffset = static_cast<unsigned>(-1);
     unsigned next = invalidOffset;
     bool needMoreContext = false;
     while (!it.atEnd()) {
         // Keep asking the iterator for chunks until the search function
         // returns an end value not equal to the length of the string passed to it.
         bool inTextSecurityMode = it.node() && it.node()->layoutObject() && it.node()->layoutObject()->style()->textSecurity() != TSNONE;
         if (!inTextSecurityMode) {
             it.text().appendTextTo(string);
@@ skipping 2181 matching lines @@
         return honorEditingBoundaryAtOrBefore(prev, visiblePosition.deepEquivalent());
     case CanSkipOverEditingBoundary:
         return skipToStartOfEditingBoundary(prev, visiblePosition.deepEquivalent());
     }
 
     ASSERT_NOT_REACHED();
     return honorEditingBoundaryAtOrBefore(prev, visiblePosition.deepEquivalent());
 }
 
 } // namespace blink