Introduce composed tree version of absoluteCaretBoundsOf()

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 53299dd01f215f8cb0d4d752ebda49434321335b..442ee637be8b8fe88a109978722c7919e67e3186 100644
--- a/Source/core/editing/VisibleUnits.cpp
+++ b/Source/core/editing/VisibleUnits.cpp
@@ -2500,7 +2500,8 @@ bool isVisuallyEquivalentCandidate(const PositionInComposedTree& position)
     return isVisuallyEquivalentCandidateAlgorithm<EditingInComposedTreeStrategy>(position);
 }
 
-IntRect absoluteCaretBoundsOf(const VisiblePosition& visiblePosition)
+template <typename Strategy>
+static IntRect absoluteCaretBoundsOfAlgorithm(const VisiblePositionTemplate<Strategy>& visiblePosition)
 {
     LayoutObject* layoutObject;
     LayoutRect localRect = localCaretRectOfPosition(visiblePosition.toPositionWithAffinity(), layoutObject);
@@ -2510,6 +2511,16 @@ IntRect absoluteCaretBoundsOf(const VisiblePosition& visiblePosition)
     return layoutObject->localToAbsoluteQuad(FloatRect(localRect)).enclosingBoundingBox();
 }
 
+IntRect absoluteCaretBoundsOf(const VisiblePosition& visiblePosition)
+{
+    return absoluteCaretBoundsOfAlgorithm<EditingStrategy>(visiblePosition);
+}
+
+IntRect absoluteCaretBoundsOf(const VisiblePositionInComposedTree& visiblePosition)
+{
+    return absoluteCaretBoundsOfAlgorithm<EditingInComposedTreeStrategy>(visiblePosition);
+}
+
 static VisiblePosition skipToEndOfEditingBoundary(const VisiblePosition& pos, const Position& anchor)
 {
     if (pos.isNull())