[WIP] Add support for Android SuggestionSpans when editing text

third_party/WebKit/Source/core/editing/markers/EditingMarkerList.h

 // Copyright 2017 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 EditingMarkerList_h
 #define EditingMarkerList_h
 
 #include "core/editing/markers/DocumentMarkerList.h"
 
 namespace blink {
 
 class DocumentMarker;
 
 // EditingMarkerList is a subclass of DocumentMarkerList that takes advantage of
 // the fact that its markers are sorted if they are inserted in a sorted order,
 // but also supports efficiently inserting markers in non-sorted order.
 // TODO(rlanday): Currently if markers are inserted in non-sorted order, this
 // class just leaves them non-sorted until the list is cleared; is it ever
 // advantageous to pre-emptively sort the list?
 class CORE_EXPORT EditingMarkerList : public DocumentMarkerList {
  public:
   EditingMarkerList();
 
   // DocumentMarkerList implementations
   bool isEditingMarkerList() const final;
 
   void add(DocumentMarker*) override;
   void clear() final;
 
-  DECLARE_VIRTUAL_TRACE();
-
  protected:
   // TODO(rlanday): determine if/when we should sort the marker list to improve
   // performance
   bool markerListIsSorted() const final;
 
   bool m_markersAreSorted;
 
   DISALLOW_COPY_AND_ASSIGN(EditingMarkerList);
 };
 
 DEFINE_TYPE_CASTS(EditingMarkerList,
                   DocumentMarkerList,
                   list,
                   list->isEditingMarkerList(),
                   list.isEditingMarkerList());
 
 }  // namespace blink
 
 #endif  // EditingMarkerList_h