Introduce composed tree version of isFirstPositionAfterTable()

Source/core/editing/EditingUtilities.h

Index: Source/core/editing/EditingUtilities.h
diff --git a/Source/core/editing/EditingUtilities.h b/Source/core/editing/EditingUtilities.h
index c4b613205c1c6125228db497024f6265f686c890..82d1fce6497bf6221f47310e636940bac693b0b5 100644
--- a/Source/core/editing/EditingUtilities.h
+++ b/Source/core/editing/EditingUtilities.h
@@ -85,7 +85,8 @@ CORE_EXPORT Node* enclosingNodeOfType(const PositionInComposedTree&, bool (*node
 
 HTMLSpanElement* tabSpanElement(const Node*);
 Element* isLastPositionBeforeTable(const VisiblePosition&);
-Element* isFirstPositionAfterTable(const VisiblePosition&);
+CORE_EXPORT Element* isFirstPositionAfterTable(const VisiblePosition&);
+CORE_EXPORT Element* isFirstPositionAfterTable(const VisiblePositionInComposedTree&);
 
 // Returns the next leaf node or nullptr if there are no more.
 // Delivers leaf nodes as if the whole DOM tree were a linear chain of its leaf nodes.