Templatize FrameSelection::contains function

Source/core/editing/FrameSelection.h

Index: Source/core/editing/FrameSelection.h
diff --git a/Source/core/editing/FrameSelection.h b/Source/core/editing/FrameSelection.h
index 7a5d90cb0ed6e805a694e697a4f12aa8d79014d6..a7687816ba304aac75200f32ad2bdae3ae11de5c 100644
--- a/Source/core/editing/FrameSelection.h
+++ b/Source/core/editing/FrameSelection.h
@@ -238,6 +238,9 @@ private:
     enum EPositionType { START, END, BASE, EXTENT };
 
     template <typename Strategy>
+    bool containsAlgorithm(const LayoutPoint&);
+
+    template <typename Strategy>
     void setNonDirectionalSelectionIfNeededAlgorithm(const VisibleSelection&, TextGranularity, EndPointsAdjustmentMode);
 
     void respondToNodeModification(Node&, bool baseRemoved, bool extentRemoved, bool startRemoved, bool endRemoved);