Tried using CrossThreadPersistent for workerDebuggerAgents

Source/modules/indexeddb/InspectorIndexedDBAgent.cpp

Index: Source/modules/indexeddb/InspectorIndexedDBAgent.cpp
diff --git a/Source/modules/indexeddb/InspectorIndexedDBAgent.cpp b/Source/modules/indexeddb/InspectorIndexedDBAgent.cpp
index 71351b51e3e4f2cfb78a3795d0ebc9c32c2c89cc..89f5e84104bafa6bd8fdbbf8b138f49c5bb573a2 100644
--- a/Source/modules/indexeddb/InspectorIndexedDBAgent.cpp
+++ b/Source/modules/indexeddb/InspectorIndexedDBAgent.cpp
@@ -551,7 +551,7 @@ LocalFrame* findFrameWithSecurityOrigin(Page* page, const String& securityOrigin
 
 void InspectorIndexedDBAgent::provideTo(Page* page)
 {
-    OwnPtr<InspectorIndexedDBAgent> agent(adoptPtr(new InspectorIndexedDBAgent(page)));
+    OwnPtrWillBeRawPtr<InspectorIndexedDBAgent> agent(adoptPtrWillBeNoop(new InspectorIndexedDBAgent(page)));
     page->inspectorController().registerModuleAgent(agent.release());
 }
 
@@ -771,4 +771,10 @@ void InspectorIndexedDBAgent::clearObjectStore(ErrorString* errorString, const S
     clearObjectStore->start(idbFactory, document->securityOrigin(), databaseName);
 }
 
+void InspectorIndexedDBAgent::trace(Visitor* visitor)
+{
+    visitor->trace(m_page);
+    InspectorBaseAgent::trace(visitor);
+}
+
 } // namespace WebCore