[DMC #10] Add type cast for TextMatchMarkerListImpl

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

Index: third_party/WebKit/Source/core/editing/markers/TextMatchMarkerListImpl.h
diff --git a/third_party/WebKit/Source/core/editing/markers/TextMatchMarkerListImpl.h b/third_party/WebKit/Source/core/editing/markers/TextMatchMarkerListImpl.h
index eb7e7e9ccfecf707479fd8f83cc0b9802d2fbd08..ca4ae45f27b214b1bd72e2f1adf01ea3ae27bd8a 100644
--- a/third_party/WebKit/Source/core/editing/markers/TextMatchMarkerListImpl.h
+++ b/third_party/WebKit/Source/core/editing/markers/TextMatchMarkerListImpl.h
@@ -39,6 +39,12 @@ class CORE_EXPORT TextMatchMarkerListImpl final : public DocumentMarkerList {
   DISALLOW_COPY_AND_ASSIGN(TextMatchMarkerListImpl);
 };
 
+DEFINE_TYPE_CASTS(TextMatchMarkerListImpl,
+                  DocumentMarkerList,
+                  list,
+                  list->MarkerType() == DocumentMarker::kTextMatch,
+                  list.MarkerType() == DocumentMarker::kTextMatch);
+
 }  // namespace blink
 
 #endif  // TextMatchMarkerListImpl_h