Introduce composed tree version of lastEditableVisiblePositionBeforePositionInRoot()

Source/core/editing/EditingUtilities.h

 /*
  * Copyright (C) 2004, 2006, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 167 matching lines @@
 {
     return Position::firstPositionInOrBeforeNode(node);
 }
 
 inline Position lastPositionInOrAfterNode(Node* node)
 {
     return Position::lastPositionInOrAfterNode(node);
 }
 
 CORE_EXPORT Position firstEditablePositionAfterPositionInRoot(const Position&, Node*);
-Position lastEditablePositionBeforePositionInRoot(const Position&, Node*);
+CORE_EXPORT Position lastEditablePositionBeforePositionInRoot(const Position&, Node*);
 CORE_EXPORT PositionInComposedTree firstEditablePositionAfterPositionInRoot(const PositionInComposedTree&, Node*);
-PositionInComposedTree lastEditablePositionBeforePositionInRoot(const PositionInComposedTree&, Node*);
+CORE_EXPORT PositionInComposedTree lastEditablePositionBeforePositionInRoot(const PositionInComposedTree&, Node*);
 
 // Move up or down the DOM by one position.
 // Offsets are computed using layout text for nodes that have layoutObjects -
 // but note that even when using composed characters, the result may be inside
 // a single user-visible character if a ligature is formed.
 CORE_EXPORT Position previousPositionOf(const Position&, PositionMoveType);
 CORE_EXPORT Position nextPositionOf(const Position&, PositionMoveType);
 CORE_EXPORT PositionInComposedTree previousPositionOf(const PositionInComposedTree&, PositionMoveType);
 CORE_EXPORT PositionInComposedTree nextPositionOf(const PositionInComposedTree&, PositionMoveType);
 
@@ skipping 35 matching lines @@
 // -------------------------------------------------------------------------
 
 // Functions returning VisiblePosition
 
 // TODO(yosin) We should rename
 // |firstEditableVisiblePositionAfterPositionInRoot()| to a better name which
 // describes what this function returns, since it returns a position before
 // specified position due by canonicalization.
 CORE_EXPORT VisiblePosition firstEditableVisiblePositionAfterPositionInRoot(const Position&, ContainerNode*);
 CORE_EXPORT VisiblePositionInComposedTree firstEditableVisiblePositionAfterPositionInRoot(const PositionInComposedTree&, ContainerNode*);
-VisiblePosition lastEditableVisiblePositionBeforePositionInRoot(const Position&, ContainerNode*);
+// TODO(yosin) We should rename
+// |lastEditableVisiblePositionBeforePositionInRoot()| to a better name which
+// describes what this function returns, since it returns a position after
+// specified position due by canonicalization.
+CORE_EXPORT VisiblePosition lastEditableVisiblePositionBeforePositionInRoot(const Position&, ContainerNode*);
+CORE_EXPORT VisiblePositionInComposedTree lastEditableVisiblePositionBeforePositionInRoot(const PositionInComposedTree&, ContainerNode*);
 VisiblePosition visiblePositionBeforeNode(Node&);
 VisiblePosition visiblePositionAfterNode(Node&);
 
 bool lineBreakExistsAtVisiblePosition(const VisiblePosition&);
 
 int comparePositions(const VisiblePosition&, const VisiblePosition&);
 
 int indexForVisiblePosition(const VisiblePosition&, RefPtrWillBeRawPtr<ContainerNode>& scope);
 EphemeralRange makeRange(const VisiblePosition&, const VisiblePosition&);
 EphemeralRange normalizeRange(const EphemeralRange&);
@@ skipping 64 matching lines @@
     // FIXME: this is required until 6853027 is fixed and text checking can do this for us.
     return character == '\'' || character == rightSingleQuotationMarkCharacter || character == hebrewPunctuationGershayimCharacter;
 }
 
 String stringWithRebalancedWhitespace(const String&, bool startIsStartOfParagraph, bool endIsEndOfParagraph);
 const String& nonBreakingSpaceString();
 
 }
 
 #endif