Revert of Support modal windows

athena/screen/screen_manager_impl.h

Index: athena/screen/screen_manager_impl.h
diff --git a/athena/screen/screen_manager_impl.h b/athena/screen/screen_manager_impl.h
deleted file mode 100644
index 17385428a9c9a6a4f3d34fd0c2790ed8136c2a9b..0000000000000000000000000000000000000000
--- a/athena/screen/screen_manager_impl.h
+++ /dev/null
@@ -1,72 +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_SCREEN_MANAGER_IMPL_H_
-#define ATHENA_SCREEN_SCREEN_MANAGER_IMPL_H_
-
-#include "athena/athena_export.h"
-#include "athena/screen/public/screen_manager.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/aura/client/window_tree_client.h"
-
-namespace aura {
-namespace client {
-class FocusClient;
-class ScreenPositionClient;
-}
-}
-
-namespace wm {
-class ScopedCaptureClient;
-}
-
-namespace athena {
-class AcceleratorHandler;
-
-class ATHENA_EXPORT ScreenManagerImpl : public ScreenManager,
-                                        public aura::client::WindowTreeClient {
- public:
-  explicit ScreenManagerImpl(aura::Window* root_window);
-  virtual ~ScreenManagerImpl();
-
-  void Init();
-
-  // Returns a container which has |priority|. Null if such container
-  // doesn't exist.
-  aura::Window* FindContainerByPriority(int priority);
-
- private:
-  // ScreenManager:
-  virtual aura::Window* CreateContainer(const ContainerParams& params) override;
-  virtual aura::Window* GetContext() override;
-  virtual void SetRotation(gfx::Display::Rotation rotation) override;
-  virtual void SetRotationLocked(bool rotation_locked) override;
-
-  // aura::client::WindowTreeClient:
-  virtual aura::Window* GetDefaultParent(aura::Window* context,
-                                         aura::Window* window,
-                                         const gfx::Rect& bounds) override;
-
-  int GetModalContainerPriority(aura::Window* window, aura::Window* parent);
-
-  // Returns a container with |params.default_parent| == true.
-  aura::Window* GetDefaultContainer();
-
-  // Not owned.
-  aura::Window* root_window_;
-
-  scoped_ptr<aura::client::FocusClient> focus_client_;
-  scoped_ptr<AcceleratorHandler> accelerator_handler_;
-  scoped_ptr<::wm::ScopedCaptureClient> capture_client_;
-  scoped_ptr<aura::client::ScreenPositionClient> screen_position_client_;
-
-  gfx::Display::Rotation last_requested_rotation_;
-  bool rotation_locked_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScreenManagerImpl);
-};
-
-}  // namespace athena
-
-#endif  // ATHENA_SCREEN_SCREEN_MANAGER_IMPL_H_