Revert 203217 "Revert 202987 "Reorder the NativeViews attached t..."

I reverted it yesterday because I thought it was burning the Aura tree. It turned out to be innocent so I'm putting it back.

TBR=avi@chromium.org

Review URL: https://codereview.chromium.org/16256004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@203402 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 22 insertions, 0 deletions

diff --git a/ui/views/view_constants_aura.h b/ui/views/view_constants_aura.h
new file mode 100644
index 0000000..e0d718d
--- /dev/null
+++ b/ui/views/view_constants_aura.h
@@ -0,0 +1,22 @@
+// Copyright 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.
+
+#ifndef UI_VIEWS_VIEW_CONSTANTS_AURA_H_
+#define UI_VIEWS_VIEW_CONSTANTS_AURA_H_
+
+#include "ui/aura/window.h"
+#include "ui/views/views_export.h"
+
+namespace views {
+class View;
+
+// A property key to indicate the view the window is associated with. If
+// specified, the z-order of the view, relative to other views, dictates the
+// z-order of the window and its associated layer. The associated view must
+// have the same parent widget as the window on which the property is set.
+VIEWS_EXPORT extern const aura::WindowProperty<View*>* const kHostViewKey;
+
+}  // namespace views
+
+#endif  // UI_VIEWS_VIEW_CONSTANTS_AURA_H_