Replace forward class declarations of VisiblePosition to include directives

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 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef EditingUtilities_h
 #define EditingUtilities_h
 
 #include "core/CoreExport.h"
 #include "core/editing/EditingBoundary.h"
 #include "core/editing/Position.h"
 #include "core/editing/PositionWithAffinity.h"
+#include "core/editing/VisiblePosition.h"
 #include "platform/text/TextDirection.h"
 #include "wtf/Forward.h"
 #include "wtf/text/CharacterNames.h"
 
 namespace blink {
 
 enum class PositionMoveType {
     CodePoint, // Move by a single code point.
     Character, // Move to the next Unicode character break.
     BackwardDeletion // Subject to platform conventions.
 };
 
 class Document;
 class Element;
 class HTMLBRElement;
 class HTMLElement;
 class HTMLLIElement;
 class HTMLSpanElement;
 class HTMLUListElement;
 class Node;
 class Range;
-class VisiblePosition;
 class VisibleSelection;
 
 // This file contains a set of helper functions used by the editing commands
 
 // -------------------------------------------------------------------------
 // Node
 // -------------------------------------------------------------------------
 
 // Functions returning Node
 
@@ skipping 240 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