Move a member function inRenderedText() out from PositionAlgorithm template class

Source/core/editing/VisibleUnits.cpp

Index: Source/core/editing/VisibleUnits.cpp
diff --git a/Source/core/editing/VisibleUnits.cpp b/Source/core/editing/VisibleUnits.cpp
index fed0969f7d5879e02880fc2c814399da8de13ade..3fbe72ff26284841e6bdd45b77960a2df0c46275 100644
--- a/Source/core/editing/VisibleUnits.cpp
+++ b/Source/core/editing/VisibleUnits.cpp
@@ -1558,10 +1558,10 @@ bool rendersInDifferentPosition(const Position& position1, const Position& posit
     if (!inSameContainingBlockFlowElement(position1.anchorNode(), position2.anchorNode()))
         return true;
 
-    if (position1.anchorNode()->isTextNode() && !position1.inRenderedText())
+    if (position1.anchorNode()->isTextNode() && !inRenderedText(position1))
         return false;
 
-    if (position2.anchorNode()->isTextNode() && !position2.inRenderedText())
+    if (position2.anchorNode()->isTextNode() && !inRenderedText(position2))
         return false;
 
     const int renderedOffset1 = renderedOffsetOf(position1);