Fixing problems with constrained windows (i.e. print preview)

ash/ash_constants.h

Index: ash/ash_constants.h
diff --git a/ash/ash_constants.h b/ash/ash_constants.h
new file mode 100644
index 0000000000000000000000000000000000000000..62fde2c13d686613d2f1df2e80211528eba18436
--- /dev/null
+++ b/ash/ash_constants.h
@@ -0,0 +1,21 @@
+// Copyright (c) 2012 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.
+
+#ifndef ASH_ASH_CONSTANTS_H_
+#define ASH_ASH_CONSTANTS_H_
+
+#include "ash/ash_export.h"
+#include "ui/aura/window.h"
+#include "ui/base/ui_base_types.h"
+
+namespace ash {
+
+// The window is a constrained window and lives therefore entirely within
+// another aura window.
+ASH_EXPORT extern const aura::WindowProperty<bool>* const
+    kConstrainedWindowKey;
+
+} // namespace ash
+
+#endif  // ASH_ASH_CONSTANTS_H_