[CodeHealth] Use Position::anchorNode instead of deprecatedNode.

Source/core/editing/iterators/SimplifiedBackwardsTextIterator.cpp

Index: Source/core/editing/iterators/SimplifiedBackwardsTextIterator.cpp
diff --git a/Source/core/editing/iterators/SimplifiedBackwardsTextIterator.cpp b/Source/core/editing/iterators/SimplifiedBackwardsTextIterator.cpp
index 5c1b65a15c9ec6ec512778096a21a43d0b2afb09..c9847a6ae4f340eb1d7ca50fd854df5c63fdc416 100644
--- a/Source/core/editing/iterators/SimplifiedBackwardsTextIterator.cpp
+++ b/Source/core/editing/iterators/SimplifiedBackwardsTextIterator.cpp
@@ -82,10 +82,10 @@ SimplifiedBackwardsTextIteratorAlgorithm<Strategy>::SimplifiedBackwardsTextItera
 {
     ASSERT(behavior == TextIteratorDefaultBehavior || behavior == TextIteratorStopsOnFormControls);
 
-    Node* startNode = start.deprecatedNode();
+    Node* startNode = start.anchorNode();
     if (!startNode)
         return;
-    Node* endNode = end.deprecatedNode();
+    Node* endNode = end.anchorNode();
     int startOffset = start.deprecatedEditingOffset();
     int endOffset = end.deprecatedEditingOffset();