Add DocumentMarkerList implementation classes

third_party/WebKit/Source/core/editing/markers/CompositionMarkerList.cpp

Index: third_party/WebKit/Source/core/editing/markers/CompositionMarkerList.cpp
diff --git a/third_party/WebKit/Source/core/editing/markers/CompositionMarkerList.cpp b/third_party/WebKit/Source/core/editing/markers/CompositionMarkerList.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..1188eb702d8cc23f4841e64fc5272a7af9825725
--- /dev/null
+++ b/third_party/WebKit/Source/core/editing/markers/CompositionMarkerList.cpp
@@ -0,0 +1,53 @@
+// 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.
+
+#include "core/editing/markers/CompositionMarkerList.h"
+
+#include "core/editing/markers/DocumentMarkerListEditor.h"
+
+namespace blink {
+
+CompositionMarkerList::CompositionMarkerList() = default;
+
+bool CompositionMarkerList::Empty() const {
+  return markers_.IsEmpty();
+}
+
+void CompositionMarkerList::Add(DocumentMarker* marker) {
+  markers_.push_back(marker);
+}
+
+void CompositionMarkerList::Clear() {
+  markers_.Clear();
+}
+
+void CompositionMarkerList::AppendMarkersToInputList(
+    DocumentMarkerVector* list) const {
+  list->AppendVector(markers_);
+}
+
+bool CompositionMarkerList::MoveMarkers(int length,
+                                        DocumentMarkerList* dst_list) {
+  return DocumentMarkerListEditor::MoveUnsortedMarkers(&markers_, length,
+                                                       dst_list);
+}
+
+bool CompositionMarkerList::RemoveMarkers(unsigned start_offset, int length) {
+  return DocumentMarkerListEditor::RemoveUnsortedMarkers(&markers_,
+                                                         start_offset, length);
+}
+
+bool CompositionMarkerList::ShiftMarkers(unsigned offset,
+                                         unsigned old_length,
+                                         unsigned new_length) {
+  return DocumentMarkerListEditor::ShiftUnsortedMarkers(&markers_, offset,
+                                                        old_length, new_length);
+}
+
+DEFINE_TRACE(CompositionMarkerList) {
+  visitor->Trace(markers_);
+  DocumentMarkerList::Trace(visitor);
+}
+
+}  // namespace blink