Implement large cursors in Mushrome.

ash/aura/shell_port_classic.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 ASH_AURA_SHELL_PORT_CLASSIC_H_
 #define ASH_AURA_SHELL_PORT_CLASSIC_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 21 matching lines @@
 
   // ShellPort:
   void Shutdown() override;
   Config GetAshConfig() const override;
   std::unique_ptr<display::TouchTransformSetter> CreateTouchTransformDelegate()
       override;
   void LockCursor() override;
   void UnlockCursor() override;
   void ShowCursor() override;
   void HideCursor() override;
+  void SetCursorSize(ui::CursorSize cursor_size) override;
   void SetGlobalOverrideCursor(base::Optional<ui::CursorData> cursor) override;
   bool IsMouseEventsEnabled() override;
   void RecordGestureAction(GestureActionType action) override;
   void RecordUserMetricsAction(UserMetricsAction action) override;
   void RecordTaskSwitchMetric(TaskSwitchSource source) override;
   std::unique_ptr<WindowResizer> CreateDragWindowResizer(
       std::unique_ptr<WindowResizer> next_window_resizer,
       wm::WindowState* window_state) override;
   std::unique_ptr<WindowCycleEventFilter> CreateWindowCycleEventFilter()
       override;
@@ skipping 27 matching lines @@
 
   std::unique_ptr<AcceleratorControllerDelegateAura>
       accelerator_controller_delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellPortClassic);
 };
 
 }  // namespace ash
 
 #endif  // ASH_AURA_SHELL_PORT_CLASSIC_H_