Add TextMatchMarkerList in preparation for DocumentMarkerController refactor

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

 /*
  * This file is part of the DOM implementation for WebCore.
  *
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 116 matching lines @@
   class MisspellingMarkers : public MarkerTypes {
    public:
     MisspellingMarkers() : MarkerTypes(Spelling | Grammar) {}
   };
 
   class SpellCheckClientMarkers : public MarkerTypes {
    public:
     SpellCheckClientMarkers() : MarkerTypes(Spelling | Grammar) {}
   };
 
+  virtual DocumentMarker* clone() const;

[Xiaocheng, 2017/03/29 23:20:57]

The introduction of clone() seems pretty light weight and orthogonal to
everything else.

Let's split it into another patch, which seems landable before all other
patches.

Let's also use it in copyMarkers() so that we can get rid of the multiple
reference issue.

+
   DocumentMarker(MarkerType,
                  unsigned startOffset,
                  unsigned endOffset,
                  const String& description);
   DocumentMarker(unsigned startOffset, unsigned endOffset, bool activeMatch);
   DocumentMarker(unsigned startOffset,
                  unsigned endOffset,
                  Color underlineColor,
                  bool thick,
                  Color backgroundColor);
 
-  DocumentMarker(const DocumentMarker&);
-
   MarkerType type() const { return m_type; }
   unsigned startOffset() const { return m_startOffset; }
   unsigned endOffset() const { return m_endOffset; }
 
   const String& description() const;
   bool activeMatch() const;
   Color underlineColor() const;
   bool thick() const;
   Color backgroundColor() const;
   DocumentMarkerDetails* details() const;
@@ skipping 19 matching lines @@
 
   bool operator==(const DocumentMarker& o) const {
     return type() == o.type() && startOffset() == o.startOffset() &&
            endOffset() == o.endOffset();
   }
 
   bool operator!=(const DocumentMarker& o) const { return !(*this == o); }
 
   DECLARE_TRACE();
 
+ protected:
+  DocumentMarker(const DocumentMarker&);
+
  private:
   MarkerType m_type;
   unsigned m_startOffset;
   unsigned m_endOffset;
   Member<DocumentMarkerDetails> m_details;
 };
 
 using DocumentMarkerVector = HeapVector<Member<DocumentMarker>>;
 
 inline DocumentMarkerDetails* DocumentMarker::details() const {
   return m_details.get();
 }
 
 class DocumentMarkerDetails
     : public GarbageCollectedFinalized<DocumentMarkerDetails> {
  public:
   DocumentMarkerDetails() {}
   virtual ~DocumentMarkerDetails();
   virtual bool isDescription() const { return false; }
   virtual bool isTextMatch() const { return false; }
   virtual bool isComposition() const { return false; }
 
   DEFINE_INLINE_VIRTUAL_TRACE() {}
 };
 
 }  // namespace blink
 
 #endif  // DocumentMarker_h