Introduce firstEditablePositionAfterPositionInRoot()

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 163 matching lines @@
 inline Position firstPositionInOrBeforeNode(Node* node)
 {
     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 PositionInComposedTree firstEditablePositionAfterPositionInRoot(const PositionInComposedTree&, Node*);
 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 112 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