Oilpan: Prepare moving InspectorController and InspectorAgents to oilpan.

Source/core/inspector/InspectorInspectorAgent.cpp

Index: Source/core/inspector/InspectorInspectorAgent.cpp
diff --git a/Source/core/inspector/InspectorInspectorAgent.cpp b/Source/core/inspector/InspectorInspectorAgent.cpp
index adacee03fa40cfa9f0855b0e64efc3f9b331bc79..296ef7039fe93eeb59aa25cb77bda8cfb055caaa 100644
--- a/Source/core/inspector/InspectorInspectorAgent.cpp
+++ b/Source/core/inspector/InspectorInspectorAgent.cpp
@@ -63,7 +63,15 @@ InspectorInspectorAgent::InspectorInspectorAgent(Page* page, InjectedScriptManag
 
 InspectorInspectorAgent::~InspectorInspectorAgent()
 {
+#if !ENABLE(OILPAN)
     m_instrumentingAgents->setInspectorInspectorAgent(0);
+#endif
+}
+
+void InspectorInspectorAgent::trace(Visitor* visitor)
+{
+    visitor->trace(m_inspectedPage);
+    InspectorBaseAgent::trace(visitor);
 }
 
 void InspectorInspectorAgent::didClearDocumentOfWindowObject(LocalFrame* frame)