1 files changed, 30 insertions, 0 deletions
diff --git a/chromium/ui/wm/core/wm_state.cc b/chromium/ui/wm/core/wm_state.cc
new file mode 100644
index 00000000000..6d580863394
--- /dev/null
+++ b/chromium/ui/wm/core/wm_state.cc
@@ -0,0 +1,30 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/wm/core/wm_state.h"
+
+#include "ui/events/platform/platform_event_source.h"
+#include "ui/wm/core/transient_window_controller.h"
+#include "ui/wm/core/transient_window_stacking_client.h"
+
+namespace wm {
+
+WMState::WMState()
+    : window_stacking_client_(new TransientWindowStackingClient),
+      transient_window_client_(new TransientWindowController) {
+  aura::client::SetWindowStackingClient(window_stacking_client_.get());
+  aura::client::SetTransientWindowClient(transient_window_client_.get());
+}
+
+WMState::~WMState() {
+  if (aura::client::GetWindowStackingClient() == window_stacking_client_.get())
+    aura::client::SetWindowStackingClient(NULL);
+
+  if (aura::client::GetTransientWindowClient() ==
+      transient_window_client_.get()) {
+    aura::client::SetTransientWindowClient(NULL);
+  }
+}
+
+}  // namespace wm