Separate athena's startup process from AppShell's

athena/screen/public/screen_manager_delegate.h

Index: athena/screen/public/screen_manager_delegate.h
diff --git a/athena/screen/public/screen_manager_delegate.h b/athena/screen/public/screen_manager_delegate.h
deleted file mode 100644
index dab259546845e437622f8cda17bec1f679d024e3..0000000000000000000000000000000000000000
--- a/athena/screen/public/screen_manager_delegate.h
+++ /dev/null
@@ -1,27 +0,0 @@
-// 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_SCREEN_PUBLIC_SCREEN_MANAGER_DELEGATE_H_
-#define ATHENA_SCREEN_PUBLIC_SCREEN_MANAGER_DELEGATE_H_
-
-#include "athena/athena_export.h"
-
-namespace gfx {
-class Insets;
-}
-
-namespace athena {
-
-// Delegate of the ScreenManager.
-class ATHENA_EXPORT ScreenManagerDelegate {
- public:
-  virtual ~ScreenManagerDelegate() {}
-
-  // Sets the screen's work area insets.
-  virtual void SetWorkAreaInsets(const gfx::Insets& insets) = 0;
-};
-
-}  // namespace athena
-
-#endif  // ATHENA_SCREEN_PUBLIC_SCREEN_MANAGER_DELEGATE_H_