Update the layout mode first when exiting tablet mode

components/exo/wm_helper_ash.cc

Index: components/exo/wm_helper_ash.cc
diff --git a/components/exo/wm_helper_ash.cc b/components/exo/wm_helper_ash.cc
index 5d117d10f2a35efdc6a661b9fbd8ebe0641b7efd..413eeb8e6a60302aea0b24eba02c7a5bdcc878e1 100644
--- a/components/exo/wm_helper_ash.cc
+++ b/components/exo/wm_helper_ash.cc
@@ -136,6 +136,10 @@ void WMHelperAsh::OnMaximizeModeStarted() {
   NotifyMaximizeModeStarted();
 }
 
+void WMHelperAsh::OnMaximizeModeEnding() {
+  NotifyMaximizeModeEnding();
+}
+
 void WMHelperAsh::OnMaximizeModeEnded() {
   NotifyMaximizeModeEnded();
 }