SurfaceAggregator should check whether output is secure when drawin

ui/views/mus/surface_context_factory.h

Index: ui/views/mus/surface_context_factory.h
diff --git a/ui/views/mus/surface_context_factory.h b/ui/views/mus/surface_context_factory.h
index df7ce18581833492beebef551fb1e73f4c7c0470..5c4dc928c1927d599f828c13da4987e8466d3d7c 100644
--- a/ui/views/mus/surface_context_factory.h
+++ b/ui/views/mus/surface_context_factory.h
@@ -52,6 +52,7 @@ class VIEWS_MUS_EXPORT SurfaceContextFactory : public ui::ContextFactory {
                      const gfx::Size& size) override;
   void SetAuthoritativeVSyncInterval(ui::Compositor* compositor,
                                      base::TimeDelta interval) override {}
+  void SetOutputIsSecure(ui::Compositor* compositor, bool secure) override {}
 
   SurfaceBinding surface_binding_;
   uint32_t next_surface_id_namespace_;