Introduce positionForPoint() in LocalFrame class as replacement of visiblePositionForPoint()

Source/core/frame/LocalFrame.h

Index: Source/core/frame/LocalFrame.h
diff --git a/Source/core/frame/LocalFrame.h b/Source/core/frame/LocalFrame.h
index bb80049b91ff36f474d25ba3e12a93e3dea4f7d6..ff6435e7c985ccd9b39a842d1b758916941cc568 100644
--- a/Source/core/frame/LocalFrame.h
+++ b/Source/core/frame/LocalFrame.h
@@ -72,7 +72,7 @@ class TreeScope;
 class ScriptController;
 class SpellChecker;
 class TreeScope;
-class VisiblePosition;
+template <typename Strategy> class PositionWithAffinityTemplate;
 
 class CORE_EXPORT LocalFrame : public Frame, public LocalFrameLifecycleNotifier, public WillBeHeapSupplementable<LocalFrame> {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(LocalFrame);
@@ -159,7 +159,7 @@ public:
     String selectedText() const;
     String selectedTextForClipboard() const;
 
-    VisiblePosition visiblePositionForPoint(const IntPoint& framePoint);
+    PositionWithAffinityTemplate<EditingAlgorithm<NodeTraversal>> positionForPoint(const IntPoint& framePoint);
     Document* documentAtPoint(const IntPoint& windowPoint);
     EphemeralRangeTemplate<EditingAlgorithm<NodeTraversal>> rangeForPoint(const IntPoint& framePoint);