aura: Defer OutputSurface creation until widget is available

ui/compositor/test/test_compositor_host_x11.cc

Index: ui/compositor/test/test_compositor_host_x11.cc
diff --git a/ui/compositor/test/test_compositor_host_x11.cc b/ui/compositor/test/test_compositor_host_x11.cc
index 1357e3ddca4d8b232dc435a204f3aec5bc62d80a..0ce963fbc9ac1c4f6c6292b05ee25547c136a1f8 100644
--- a/ui/compositor/test/test_compositor_host_x11.cc
+++ b/ui/compositor/test/test_compositor_host_x11.cc
@@ -73,7 +73,7 @@ void TestCompositorHostX11::Show() {
     if (event.type == MapNotify && event.xmap.window == window_)
       break;
   }
-  compositor_.SetAcceleratedWidgetAndStartCompositor(window_);
+  compositor_.SetAcceleratedWidget(window_);
   compositor_.SetScaleAndSize(1.0f, bounds_.size());
 }