Oilpan: move DOM string collection objects to the Oilpan heap.

Source/bindings/v8/IDBBindingUtilities.cpp

Index: Source/bindings/v8/IDBBindingUtilities.cpp
diff --git a/Source/bindings/v8/IDBBindingUtilities.cpp b/Source/bindings/v8/IDBBindingUtilities.cpp
index ee02e441cb61ec74de66ac409696a4fc491cb337..9949a38c01082e4523a1a10b58aa963164ca377e 100644
--- a/Source/bindings/v8/IDBBindingUtilities.cpp
+++ b/Source/bindings/v8/IDBBindingUtilities.cpp
@@ -63,7 +63,7 @@ static v8::Handle<v8::Value> toV8(const IDBKeyPath& value, v8::Handle<v8::Object
     case IDBKeyPath::StringType:
         return v8String(isolate, value.string());
     case IDBKeyPath::ArrayType:
-        RefPtr<DOMStringList> keyPaths = DOMStringList::create();
+        RefPtrWillBeRawPtr<DOMStringList> keyPaths = DOMStringList::create();
         for (Vector<String>::const_iterator it = value.array().begin(); it != value.array().end(); ++it)
             keyPaths->append(*it);
         return toV8(keyPaths.release(), creationContext, isolate);