InlinedVisitor: Migrate filesystem to use inlined tracing

Source/modules/filesystem/SyncCallbackHelper.h

Index: Source/modules/filesystem/SyncCallbackHelper.h
diff --git a/Source/modules/filesystem/SyncCallbackHelper.h b/Source/modules/filesystem/SyncCallbackHelper.h
index a7dcbe5064afa811c9be2e48fe87befdf55efe12..8d13e662c47e6fc65385aef0d39e49abc0962e68 100644
--- a/Source/modules/filesystem/SyncCallbackHelper.h
+++ b/Source/modules/filesystem/SyncCallbackHelper.h
@@ -86,7 +86,7 @@ public:
     SuccessCallback* successCallback() { return SuccessCallbackImpl::create(this); }
     ErrorCallback* errorCallback() { return ErrorCallbackImpl::create(this); }
 
-    void trace(Visitor* visitor)
+    DEFINE_INLINE_TRACE()
     {
         visitor->trace(m_result);
     }
@@ -167,7 +167,7 @@ struct EmptyType : public GarbageCollected<EmptyType> {
         return 0;
     }
 
-    void trace(Visitor*) { }
+    DEFINE_INLINE_TRACE() { }
 };
 
 typedef SyncCallbackHelper<EntryCallback, Entry*, EntrySync> EntrySyncCallbackHelper;