views/mus: Have explicit ownership of views::WindowManagerConnection.

mash/example/views_examples/views_examples_application_delegate.h

Index: mash/example/views_examples/views_examples_application_delegate.h
diff --git a/mash/example/views_examples/views_examples_application_delegate.h b/mash/example/views_examples/views_examples_application_delegate.h
index a05cb33751b8f93096fb1719ee8b6d6449a1db64..9e8a357e7548771eb40590ec2419a139b5248b3f 100644
--- a/mash/example/views_examples/views_examples_application_delegate.h
+++ b/mash/example/views_examples/views_examples_application_delegate.h
@@ -15,6 +15,7 @@
 
 namespace views {
 class AuraInit;
+class WindowManagerConnection;
 }
 
 class ViewsExamplesApplicationDelegate
@@ -43,6 +44,7 @@ class ViewsExamplesApplicationDelegate
 
   mojo::TracingImpl tracing_;
   std::unique_ptr<views::AuraInit> aura_init_;
+  std::unique_ptr<views::WindowManagerConnection> window_manager_connection_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewsExamplesApplicationDelegate);
 };