Enable Oilpan for core/xml/

Source/core/inspector/InspectorDOMAgent.cpp

Index: Source/core/inspector/InspectorDOMAgent.cpp
diff --git a/Source/core/inspector/InspectorDOMAgent.cpp b/Source/core/inspector/InspectorDOMAgent.cpp
index 9717305d781a7cc520475ac069d4762f5c9ac0f5..a7d6844bfaa08a3a434cba21b7cd363fc489b72c 100644
--- a/Source/core/inspector/InspectorDOMAgent.cpp
+++ b/Source/core/inspector/InspectorDOMAgent.cpp
@@ -1082,7 +1082,7 @@ void InspectorDOMAgent::performSearch(ErrorString*, const String& whitespaceTrim
             Document* document = *it;
             ASSERT(document);
             TrackExceptionState exceptionState;
-            RefPtrWillBeRawPtr<XPathResult> result = DocumentXPathEvaluator::evaluate(*document, whitespaceTrimmedQuery, document, nullptr, XPathResult::ORDERED_NODE_SNAPSHOT_TYPE, 0, exceptionState);
+            XPathResult* result = DocumentXPathEvaluator::evaluate(*document, whitespaceTrimmedQuery, document, nullptr, XPathResult::ORDERED_NODE_SNAPSHOT_TYPE, 0, exceptionState);
             if (exceptionState.hadException() || !result)
                 continue;
 
@@ -2200,4 +2200,3 @@ void InspectorDOMAgent::trace(Visitor* visitor)
 }
 
 } // namespace blink
-