Introduce lineDirectionPointForBlockDirectionNavigationOf() for VisiblePosition

Source/core/editing/FrameSelection.cpp

Index: Source/core/editing/FrameSelection.cpp
diff --git a/Source/core/editing/FrameSelection.cpp b/Source/core/editing/FrameSelection.cpp
index a9ca281adba5bccd01a0725c682adbe0899600a0..556dcb361861e71760bae69d1571cf63875e98e5 100644
--- a/Source/core/editing/FrameSelection.cpp
+++ b/Source/core/editing/FrameSelection.cpp
@@ -1211,7 +1211,7 @@ LayoutUnit FrameSelection::lineDirectionPointForBlockDirectionNavigation(EPositi
         VisiblePosition visiblePosition(pos, m_selection.affinity());
         // VisiblePosition creation can fail here if a node containing the selection becomes visibility:hidden
         // after the selection is created and before this function is called.
-        x = visiblePosition.lineDirectionPointForBlockDirectionNavigation();
+        x = lineDirectionPointForBlockDirectionNavigationOf(visiblePosition);
         m_xPosForVerticalArrowNavigation = x;
     } else {
         x = m_xPosForVerticalArrowNavigation;