[part 2] Make classes and structures in modules fast-allocated.

Source/modules/indexeddb/DOMWindowIndexedDatabase.h

Index: Source/modules/indexeddb/DOMWindowIndexedDatabase.h
diff --git a/Source/modules/indexeddb/DOMWindowIndexedDatabase.h b/Source/modules/indexeddb/DOMWindowIndexedDatabase.h
index 9a072342d3c4b996d955e1ff2b80ec18e978c66e..af73d0bd73519017ffe01282db73bf003ac20d88 100644
--- a/Source/modules/indexeddb/DOMWindowIndexedDatabase.h
+++ b/Source/modules/indexeddb/DOMWindowIndexedDatabase.h
@@ -38,6 +38,7 @@ class DOMWindow;
 class DOMWindowIndexedDatabase final : public NoBaseWillBeGarbageCollected<DOMWindowIndexedDatabase>, public WillBeHeapSupplement<LocalDOMWindow>, public DOMWindowProperty {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DOMWindowIndexedDatabase);
     DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(DOMWindowIndexedDatabase);
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(DOMWindowIndexedDatabase);
 public:
     static DOMWindowIndexedDatabase& from(LocalDOMWindow&);