[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h

Index: third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h b/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h
index 36649732919483980edf1527474792f9f8784ce6..01dcff4f91de01b3c72473848ad6db945d01a216 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBTransaction.h
@@ -26,6 +26,7 @@
 #ifndef IDBTransaction_h
 #define IDBTransaction_h
 
+#include "bindings/core/v8/ActiveScriptWrappable.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/events/EventListener.h"
@@ -50,6 +51,7 @@ struct IDBObjectStoreMetadata;
 
 class MODULES_EXPORT IDBTransaction final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<IDBTransaction>
+    , public ActiveScriptWrappable
     , public ActiveDOMObject {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(IDBTransaction);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(IDBTransaction);
@@ -98,8 +100,10 @@ public:
     const AtomicString& interfaceName() const override;
     ExecutionContext* getExecutionContext() const override;
 
+    // ActiveScriptWrappable
+    bool hasPendingActivity() const final;
+
     // ActiveDOMObject
-    bool hasPendingActivity() const override;
     void stop() override;
 
 protected: