athena: A simpler implementation of WindowListProvider.

athena/wm/window_list_provider_impl.h

+// Copyright 2014 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 ATHENA_WM_WINDOW_LIST_PROVIDER_IMPL_H_
+#define ATHENA_WM_WINDOW_LIST_PROVIDER_IMPL_H_
+
+#include "athena/wm/public/window_list_provider.h"
+
+namespace athena {
+
+// This implementation of the WindowListProviderImpl uses the same order as in
+// the container window's stacking order.
+class ATHENA_EXPORT WindowListProviderImpl : public WindowListProvider {
+ public:
+  explicit WindowListProviderImpl(aura::Window* container);
+  virtual ~WindowListProviderImpl();
+
+ private:
+  // WindowListProvider:
+  virtual aura::Window::Windows GetWindowList() const OVERRIDE;
+
+  aura::Window* container_;
+
+  DISALLOW_COPY_AND_ASSIGN(WindowListProviderImpl);
+};
+
+}  // namespace athena
+
+#endif  // ATHENA_WM_WINDOW_LIST_PROVIDER_IMPL_H_