Revert of Support modal windows

athena/system/shutdown_dialog.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_SYSTEM_SHUTDOWN_DIALOG_H_
 #define ATHENA_SYSTEM_SHUTDOWN_DIALOG_H_
 
 #include "athena/input/public/input_manager.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 
 namespace aura {
 class Window;
 }
 
 namespace views {
 class Widget;
 }
 
 namespace athena {
 
 // Shuts down in response to the power button being pressed.
 class ShutdownDialog : public PowerButtonObserver {
  public:
-  explicit ShutdownDialog();
+  explicit ShutdownDialog(aura::Window* dialog_container);
   virtual ~ShutdownDialog();
 
  private:
   enum State {
     // Releasing the power button sends a suspend request.
     STATE_SUSPEND_ON_RELEASE,
 
     // A warning that the device is about to be shutdown is visible. Releasing
     // the power button does not send a suspend or a shutdown request.
     STATE_SHUTDOWN_WARNING_VISIBLE,
@@ skipping 23 matching lines @@
   State state_;
 
   base::OneShotTimer<ShutdownDialog> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(ShutdownDialog);
 };
 
 }  // namespace athena
 
 #endif  // ATHENA_SYSTEM_SHUTDOWN_DIALOG_H_