exo: Run exo in mus+ash

components/exo/wm_helper_ash.h

Index: components/exo/wm_helper_ash.h
diff --git a/components/exo/wm_helper_ash.h b/components/exo/wm_helper_ash.h
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+++ b/components/exo/wm_helper_ash.h
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+// Copyright 2016 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 COMPONENTS_EXO_WM_HELPER_ASH_H_
+#define COMPONENTS_EXO_WM_HELPER_ASH_H_
+
+#include "ash/common/shell_observer.h"
+#include "base/macros.h"
+#include "components/exo/wm_helper.h"
+#include "ui/aura/client/cursor_client_observer.h"
+#include "ui/aura/client/focus_change_observer.h"
+#include "ui/wm/public/activation_change_observer.h"
+
+namespace exo {
+
+// A helper class for accessing WindowManager related features.
+class WMHelperAsh : public WMHelper,
+                    public aura::client::ActivationChangeObserver,
+                    public aura::client::FocusChangeObserver,
+                    public aura::client::CursorClientObserver,
+                    public ash::ShellObserver {
+ public:
+  WMHelperAsh();
+  ~WMHelperAsh() override;
+
+ private:
+  // Overriden from WMHelper:
+  const ash::DisplayInfo GetDisplayInfo(int64_t display_id) const override;
+  aura::Window* GetContainer(int container_id) override;
+  aura::Window* GetActiveWindow() const override;
+  aura::Window* GetFocusedWindow() const override;
+  ui::CursorSetType GetCursorSet() const override;
+  void AddPreTargetHandler(ui::EventHandler* handler) override;
+  void PrependPreTargetHandler(ui::EventHandler* handler) override;
+  void RemovePreTargetHandler(ui::EventHandler* handler) override;
+  void AddPostTargetHandler(ui::EventHandler* handler) override;
+  void RemovePostTargetHandler(ui::EventHandler* handler) override;
+  bool IsMaximizeModeWindowManagerEnabled() const override;
+
+  // Overriden from aura::client::ActivationChangeObserver:
+  void OnWindowActivated(
+      aura::client::ActivationChangeObserver::ActivationReason reason,
+      aura::Window* gained_active,
+      aura::Window* lost_active) override;
+
+  // Overriden from aura::client::FocusChangeObserver:
+  void OnWindowFocused(aura::Window* gained_focus,
+                       aura::Window* lost_focus) override;
+
+  // Overriden from aura::client::CursorClientObserver:
+  void OnCursorVisibilityChanged(bool is_visible) override;
+  void OnCursorSetChanged(ui::CursorSetType cursor_set) override;
+
+  // Overriden from ash::ShellObserver:
+  void OnMaximizeModeStarted() override;
+  void OnMaximizeModeEnded() override;
+
+  DISALLOW_COPY_AND_ASSIGN(WMHelperAsh);
+};
+
+}  // namespace exo
+
+#endif  // COMPONENTS_EXO_WM_HELPER_H_