Moves management of transients out of Window

ui/views/corewm/focus_controller_unittest.cc

Index: ui/views/corewm/focus_controller_unittest.cc
diff --git a/ui/views/corewm/focus_controller_unittest.cc b/ui/views/corewm/focus_controller_unittest.cc
index 349f517d7bd1d1bfae4c44bbd1666548b9f96487..097bd12bd64b34e853cb5a36bfbf6b29914564bb 100644
--- a/ui/views/corewm/focus_controller_unittest.cc
+++ b/ui/views/corewm/focus_controller_unittest.cc
@@ -20,6 +20,7 @@
 #include "ui/aura/window_tracker.h"
 #include "ui/events/event_handler.h"
 #include "ui/views/corewm/base_focus_rules.h"
+#include "ui/views/corewm/transient_window_stacking_client.h"
 
 namespace views {
 namespace corewm {
@@ -213,6 +214,10 @@ class FocusControllerTestBase : public aura::test::AuraTestBase {
 
   // Overridden from aura::test::AuraTestBase:
   virtual void SetUp() OVERRIDE {
+    // SetWindowStackingClient() takes ownership of
+    // TransientWindowStackingClient.
+    aura::client::SetWindowStackingClient(
+        new corewm::TransientWindowStackingClient);
     // FocusController registers itself as an Env observer so it can catch all
     // window initializations, including the root_window()'s, so we create it
     // before allowing the base setup.
@@ -259,6 +264,7 @@ class FocusControllerTestBase : public aura::test::AuraTestBase {
     aura::test::AuraTestBase::TearDown();
     test_focus_rules_ = NULL;  // Owned by FocusController.
     focus_controller_.reset();
+    aura::client::SetWindowStackingClient(NULL);
   }
 
   void FocusWindow(aura::Window* window) {