StructTraits to map mus::mojom::Event to unique_ptr<ui::Event>

ash/mus/accelerator_registrar_unittest.cc

Index: ash/mus/accelerator_registrar_unittest.cc
diff --git a/ash/mus/accelerator_registrar_unittest.cc b/ash/mus/accelerator_registrar_unittest.cc
index aee5d52150224d27a73526dcb36ad6cdcfe36506..180eff8428769fc14033d63ba4a6f734ed7104ee 100644
--- a/ash/mus/accelerator_registrar_unittest.cc
+++ b/ash/mus/accelerator_registrar_unittest.cc
@@ -56,7 +56,7 @@ class TestAcceleratorHandler : public AcceleratorHandler {
   }
 
   // AcceleratorHandler:
-  void OnAccelerator(uint32_t id, ::mus::mojom::EventPtr event) override {}
+  void OnAccelerator(uint32_t id, std::unique_ptr<ui::Event> event) override {}
 
   std::set<uint32_t> installed_accelerators_;
   std::unique_ptr<base::RunLoop> run_loop_;