Templatize handleMousePressEventSingleClick in SelectionController

Source/core/editing/SelectionController.h

Index: Source/core/editing/SelectionController.h
diff --git a/Source/core/editing/SelectionController.h b/Source/core/editing/SelectionController.h
index 980fe65b89aceaa1f24f2781a1c1f0a03e4e0270..e4649efab71243d72e29f328307cbba570847b91 100644
--- a/Source/core/editing/SelectionController.h
+++ b/Source/core/editing/SelectionController.h
@@ -69,6 +69,9 @@ private:
     explicit SelectionController(LocalFrame&);
 
     template <typename Strategy>
+    bool handleMousePressEventSingleClickAlgorithm(const MouseEventWithHitTestResults&);
+
+    template <typename Strategy>
     void updateSelectionForMouseDragAlgorithm(const HitTestResult&, Node*, const LayoutPoint&, const IntPoint&);
 
     enum AppendTrailingWhitespace { ShouldAppendTrailingWhitespace, DontAppendTrailingWhitespace };