Utilize Position::IsEquivalent() in {Up,Down}streamIgnoringEditingBoundaries()

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
@@ skipping 2354 matching lines @@
         return match;
     }
   }
   return 0;
 }
 
 template <typename Strategy>
 PositionTemplate<Strategy> DownstreamIgnoringEditingBoundaries(
     PositionTemplate<Strategy> position) {
   PositionTemplate<Strategy> last_position;
-  while (position != last_position) {
+  while (!position.IsEquivalent(last_position)) {
     last_position = position;
     position = MostForwardCaretPosition(position, kCanCrossEditingBoundary);
   }
   return position;
 }
 
 template <typename Strategy>
 PositionTemplate<Strategy> UpstreamIgnoringEditingBoundaries(
     PositionTemplate<Strategy> position) {
   PositionTemplate<Strategy> last_position;
-  while (position != last_position) {
+  while (!position.IsEquivalent(last_position)) {
     last_position = position;
     position = MostBackwardCaretPosition(position, kCanCrossEditingBoundary);
   }
   return position;
 }
 
 // Returns true if |inlineBox| starts different direction of embedded text ru.
 // See [1] for details.
 // [1] UNICODE BIDIRECTIONAL ALGORITHM, http://unicode.org/reports/tr9/
 static bool IsStartOfDifferentDirection(const InlineBox* inline_box) {
@@ skipping 1702 matching lines @@
 
 Position SkipWhitespace(const Position& position) {
   return SkipWhitespaceAlgorithm(position);
 }
 
 PositionInFlatTree SkipWhitespace(const PositionInFlatTree& position) {
   return SkipWhitespaceAlgorithm(position);
 }
 
 }  // namespace blink