Oilpan: transition types for remaining Node hierarchy object occurrences.

Source/core/editing/ApplyBlockElementCommand.cpp

Index: Source/core/editing/ApplyBlockElementCommand.cpp
diff --git a/Source/core/editing/ApplyBlockElementCommand.cpp b/Source/core/editing/ApplyBlockElementCommand.cpp
index 8467d47eb5034aceaf460169541d880aab429945..cf782cbd3db95e8961b4400037ba809abe60b654 100644
--- a/Source/core/editing/ApplyBlockElementCommand.cpp
+++ b/Source/core/editing/ApplyBlockElementCommand.cpp
@@ -85,9 +85,9 @@ void ApplyBlockElementCommand::doApply()
     VisiblePosition endOfSelection = selection.visibleEnd();
     ASSERT(!startOfSelection.isNull());
     ASSERT(!endOfSelection.isNull());
-    RefPtr<ContainerNode> startScope;
+    RefPtrWillBeRawPtr<ContainerNode> startScope = nullptr;
     int startIndex = indexForVisiblePosition(startOfSelection, startScope);
-    RefPtr<ContainerNode> endScope;
+    RefPtrWillBeRawPtr<ContainerNode> endScope = nullptr;
     int endIndex = indexForVisiblePosition(endOfSelection, endScope);
 
     formatSelection(startOfSelection, endOfSelection);