Gets chrome --mus some what working

ash/aura/wm_shell_aura.cc

Index: ash/aura/wm_shell_aura.cc
diff --git a/ash/aura/wm_shell_aura.cc b/ash/aura/wm_shell_aura.cc
index 351100142f1b6926bab2d5ac83cba80e5af43fde..90e5bd4dd8ec1e1bd461f9a5e4b83ae0912f6415 100644
--- a/ash/aura/wm_shell_aura.cc
+++ b/ash/aura/wm_shell_aura.cc
@@ -24,6 +24,7 @@
 #include "ash/laser/laser_pointer_controller.h"
 #include "ash/magnifier/partial_magnification_controller.h"
 #include "ash/metrics/task_switch_metrics_recorder.h"
+#include "ash/public/cpp/config.h"
 #include "ash/shared/immersive_fullscreen_controller.h"
 #include "ash/shell.h"
 #include "ash/touch/touch_uma.h"
@@ -75,6 +76,10 @@ bool WmShellAura::IsRunningInMash() const {
   return false;
 }
 
+Config WmShellAura::GetConfig() const {
+  return Config::CLASSIC;
+}
+
 WmWindow* WmShellAura::GetFocusedWindow() {
   return WmWindow::Get(
       aura::client::GetFocusClient(Shell::GetPrimaryRootWindow())