DocumentMarkerList refactor as an interface

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

Index: third_party/WebKit/Source/core/editing/markers/DocumentMarkerList.h
diff --git a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerList.h b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerList.h
new file mode 100644
index 0000000000000000000000000000000000000000..1138656fbcc8d10ac6ba010cb6ea6d01aaea9a53
--- /dev/null
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerList.h
@@ -0,0 +1,49 @@
+// 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 DocumentMarkerList_h
+#define DocumentMarkerList_h
+
+#include "core/editing/markers/DocumentMarker.h"
+#include "platform/heap/Handle.h"
+
+namespace blink {
+
+class CORE_EXPORT DocumentMarkerList
+    : public GarbageCollectedFinalized<DocumentMarkerList> {
+ public:
+  DocumentMarkerList();
+
+  virtual ~DocumentMarkerList();
+
+  virtual DocumentMarker::MarkerType GetAllowedMarkerType() const = 0;
+
+  virtual bool Empty() const = 0;
+  virtual DocumentMarker* At(size_t index) = 0;
+
+  virtual void Add(DocumentMarker*) = 0;
+  virtual void Clear() = 0;
+
+  virtual void AppendMarkersToInputList(DocumentMarkerVector* list) const = 0;
+
+  enum class DidMoveMarkerOrNot { kDidNotMoveMarker, kDidMoveMarker };
+  virtual DidMoveMarkerOrNot MoveMarkers(int length,
+                                         DocumentMarkerList* dst_list) = 0;
+
+  enum class DidRemoveMarkerOrNot { kDidNotRemoveMarker, kDidRemoveMarker };
+  virtual DidRemoveMarkerOrNot RemoveMarkers(unsigned start_offset,
+                                             int length) = 0;
+
+  enum class DidShiftMarkerOrNot { kDidNotShiftMarker, kDidShiftMarker };
+  virtual DidShiftMarkerOrNot ShiftMarkers(unsigned offset,
+                                           unsigned old_length,
+                                           unsigned new_length) = 0;
+
+  DEFINE_INLINE_VIRTUAL_TRACE() {}
+  DISALLOW_COPY_AND_ASSIGN(DocumentMarkerList);
+};
+
+}  // namespace blink
+
+#endif  // DocumentMarkerList_h