blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/editing/EditingStrategy.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EditingStrategy_h
 #define EditingStrategy_h
 
 #include "core/CoreExport.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/shadow/FlatTreeTraversal.h"
 #include "wtf/Allocator.h"
 
 namespace blink {
 
-template <typename Strategy>
-class PositionTemplate;
-
-template <typename Strategy>
-class PositionIteratorAlgorithm;
-
 // Editing algorithm defined on node traversal.
 template <typename Traversal>
 class CORE_TEMPLATE_CLASS_EXPORT EditingAlgorithm : public Traversal {
   STATIC_ONLY(EditingAlgorithm);
 
  public:
   static int caretMaxOffset(const Node&);
   // This method is used to create positions in the DOM. It returns the
   // maximum valid offset in a node. It returns 1 for some elements even
   // though they do not have children, which creates technically invalid DOM
   // Positions. Be sure to call |parentAnchoredEquivalent()| on a Position
   // before using it to create a DOM Range, or an exception will be thrown.
   static int lastOffsetForEditing(const Node*);
   static Node* rootUserSelectAllForNode(Node*);
 };
 
 extern template class CORE_EXTERN_TEMPLATE_EXPORT
     EditingAlgorithm<NodeTraversal>;
 extern template class CORE_EXTERN_TEMPLATE_EXPORT
     EditingAlgorithm<FlatTreeTraversal>;
 
 // DOM tree version of editing algorithm
 using EditingStrategy = EditingAlgorithm<NodeTraversal>;
 // Flat tree version of editing algorithm
 using EditingInFlatTreeStrategy = EditingAlgorithm<FlatTreeTraversal>;
 
 }  // namespace blink
 
 #endif  // EditingStrategy_h