exo: Fix cursor scale when crossing displays

components/exo/wm_helper_ash.h

 // 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/shell_observer.h"
 #include "ash/system/accessibility_observer.h"
 #include "ash/wm/ash_native_cursor_manager.h"
@@ skipping 29 matching lines @@
   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;
   bool IsSpokenFeedbackEnabled() const override;
   void PlayEarcon(int sound_key) const override;
+  void SetCursor(gfx::NativeCursor cursor) override;
 
   // Overridden from aura::client::ActivationChangeObserver:
   void OnWindowActivated(
       aura::client::ActivationChangeObserver::ActivationReason reason,
       aura::Window* gained_active,
       aura::Window* lost_active) override;
 
   // Overridden from aura::client::FocusChangeObserver:
   void OnWindowFocused(aura::Window* gained_focus,
                        aura::Window* lost_focus) override;
@@ skipping 20 matching lines @@
   // Overridden from ui::InputDeviceEventObserver:
   void OnKeyboardDeviceConfigurationChanged() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WMHelperAsh);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_WM_HELPER_H_