Moves management of transients out of Window

ui/views/test/test_views_delegate.cc

Index: ui/views/test/test_views_delegate.cc
diff --git a/ui/views/test/test_views_delegate.cc b/ui/views/test/test_views_delegate.cc
index a310121acd06833756718b8a107884c806b55fd3..3132fc594f1e74be0c353fcb8ad15d3151283eaa 100644
--- a/ui/views/test/test_views_delegate.cc
+++ b/ui/views/test/test_views_delegate.cc
@@ -13,16 +13,28 @@
 #include "ui/views/widget/native_widget_aura.h"
 #endif
 
+#if defined(USE_AURA)
+#include "ui/views/corewm/transient_window_stacking_client.h"
+#endif
+
 namespace views {
 
 TestViewsDelegate::TestViewsDelegate()
     : use_transparent_windows_(false) {
   DCHECK(!ViewsDelegate::views_delegate);
   ViewsDelegate::views_delegate = this;
+#if defined(USE_AURA)
+  // SetWindowStackingClient() takes ownership of TransientWindowStackingClient.
+  aura::client::SetWindowStackingClient(
+      new corewm::TransientWindowStackingClient);
+#endif
 }
 
 TestViewsDelegate::~TestViewsDelegate() {
   ViewsDelegate::views_delegate = NULL;
+#if defined(USE_AURA)
+  aura::client::SetWindowStackingClient(NULL);
+#endif
 }
 
 void TestViewsDelegate::SetUseTransparentWindows(bool transparent) {