Fix bug in DocumentMarkerController::addMarker(Node* node, const DocumentMarker& newMarker)

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

Index: third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp
diff --git a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp
index 8a4f76b6531840cdcd2c4c882effb346324c54eb..6b0a0edc9c8a29c5891c186b0a702465493e72b6 100644
--- a/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.cpp
@@ -244,7 +244,7 @@ void DocumentMarkerController::addMarker(Node* node,
   DocumentMarker::MarkerTypeIndex markerListIndex =
       MarkerTypeToMarkerIndex(newMarker.type());
   if (!markers->at(markerListIndex)) {
-    markers->insert(markerListIndex, new MarkerList);
+    markers->at(markerListIndex) = new MarkerList;
   }
 
   Member<MarkerList>& list = markers->at(markerListIndex);