[DMC #25] Make DocumentMarker::GetType() virtual

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

Index: third_party/WebKit/Source/core/editing/markers/SpellingMarker.cpp
diff --git a/third_party/WebKit/Source/core/editing/markers/SpellingMarker.cpp b/third_party/WebKit/Source/core/editing/markers/SpellingMarker.cpp
index 2b6f28794726a09ccea902abcb6a13f55c602635..bd736e7eed2bc49c129abbe93e54ccb99b7ae70f 100644
--- a/third_party/WebKit/Source/core/editing/markers/SpellingMarker.cpp
+++ b/third_party/WebKit/Source/core/editing/markers/SpellingMarker.cpp
@@ -9,9 +9,10 @@ namespace blink {
 SpellingMarker::SpellingMarker(unsigned start_offset,
                                unsigned end_offset,
                                const String& description)
-    : SpellCheckMarker(DocumentMarker::kSpelling,
-                       start_offset,
-                       end_offset,
-                       description) {}
+    : SpellCheckMarker(start_offset, end_offset, description) {}
+
+DocumentMarker::MarkerType SpellingMarker::GetType() const {
+  return DocumentMarker::kSpelling;
+}
 
 }  // namespace blink