Make inSameLine() in VisibleUnits.cpp to work with positions in composed tree

Source/core/editing/VisiblePosition.cpp

Index: Source/core/editing/VisiblePosition.cpp
diff --git a/Source/core/editing/VisiblePosition.cpp b/Source/core/editing/VisiblePosition.cpp
index e5e6d2ce29e936e80d9a361825f76b1fcca2a0e2..b04bd5ce0bb0a48e70dc9d311ecca844bdd8fbb3 100644
--- a/Source/core/editing/VisiblePosition.cpp
+++ b/Source/core/editing/VisiblePosition.cpp
@@ -445,7 +445,7 @@ VisiblePosition VisiblePosition::right(bool stayInEditableContent) const
 }
 
 template <typename PositionWithAffinityType>
-PositionWithAffinityType honorEditingBoundaryAtOrBeforeAlgorithm(const PositionWithAffinityType& pos, const Position& anchor)
+PositionWithAffinityType honorEditingBoundaryAtOrBeforeAlgorithm(const PositionWithAffinityType& pos, const typename PositionWithAffinityType::PositionType& anchor)
 {
     if (pos.isNull())
         return pos;
@@ -476,6 +476,11 @@ PositionWithAffinity honorEditingBoundaryAtOrBeforeOf(const PositionWithAffinity
     return honorEditingBoundaryAtOrBeforeAlgorithm(pos, anchor);
 }
 
+PositionInComposedTreeWithAffinity honorEditingBoundaryAtOrBeforeOf(const PositionInComposedTreeWithAffinity& pos, const PositionInComposedTree& anchor)
+{
+    return honorEditingBoundaryAtOrBeforeAlgorithm(pos, anchor);
+}
+
 VisiblePosition VisiblePosition::honorEditingBoundaryAtOrBefore(const VisiblePosition &pos) const
 {
     return VisiblePosition(honorEditingBoundaryAtOrBeforeOf(PositionWithAffinity(pos.deepEquivalent(), pos.affinity()), deepEquivalent()));