[WIP] Refactor DocumentMarker

third_party/WebKit/Source/core/editing/markers/SpellCheckMarker.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 SpellCheckMarker_h
+#define SpellCheckMarker_h
+
+#include "core/editing/markers/DocumentMarker.h"
+
+namespace blink {
+
+class CORE_EXPORT SpellCheckMarker final : public DocumentMarker {
+ public:
+  SpellCheckMarker(DocumentMarker::MarkerType,
+                   unsigned startOffset,
+                   unsigned endOffset,
+                   const String& description);
+
+  // DocumentMarker implementations
+  SpellCheckMarker* clone() const final;
+
+  MarkerType type() const final;
+
+  const String& description() const final;
+
+ protected:
+  SpellCheckMarker(const SpellCheckMarker&) = default;
+
+ private:
+  DocumentMarker::MarkerType m_type;
+  String m_description;
+};
+
+DEFINE_TYPE_CASTS(SpellCheckMarker,
+                  DocumentMarker,
+                  marker,
+                  marker->type() == DocumentMarker::Spelling ||
+                      marker->type() == DocumentMarker::Grammar,
+                  marker.type() == DocumentMarker::Spelling ||
+                      marker.type() == DocumentMarker::Grammar);
+
+}  // namespace blink
+
+#endif  // SpellCheckMarker_h