Implement large cursors in Mushrome.

ash/shell_port.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_SHELL_PORT_H_
 #define ASH_SHELL_PORT_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 15 matching lines @@
 
 namespace display {
 class NativeDisplayDelegate;
 class TouchTransformSetter;
 }
 
 namespace gfx {
 class Point;
 }
 
+namespace ui {
+enum class CursorSize;
+}
+
 namespace views {
 class PointerWatcher;
 enum class PointerWatcherEventTypes;
 }
 
 namespace ash {
 class AcceleratorController;
 class AshWindowTreeHost;
 struct AshWindowTreeHostInitParams;
 class ImmersiveFullscreenController;
@@ skipping 49 matching lines @@
   // For testing only: set simulation that a modal window is open
   void SimulateModalWindowOpenForTesting(bool modal_window_open) {
     simulate_modal_window_open_for_testing_ = modal_window_open;
   }
 
   // See aura::client::CursorClient for details on these.
   virtual void LockCursor() = 0;
   virtual void UnlockCursor() = 0;
   virtual void ShowCursor() = 0;
   virtual void HideCursor() = 0;
+  virtual void SetCursorSize(ui::CursorSize cursor_size) = 0;
   virtual void SetGlobalOverrideCursor(
       base::Optional<ui::CursorData> cursor) = 0;
   virtual bool IsMouseEventsEnabled() = 0;
 
   virtual void RecordGestureAction(GestureActionType action) = 0;
   virtual void RecordUserMetricsAction(UserMetricsAction action) = 0;
   virtual void RecordTaskSwitchMetric(TaskSwitchSource source) = 0;
 
   // Shows the context menu for the wallpaper or shelf at |location_in_screen|.
   void ShowContextMenu(const gfx::Point& location_in_screen,
@@ skipping 82 matching lines @@
   static ShellPort* instance_;
 
   base::ObserverList<LockStateObserver> lock_state_observers_;
 
   bool simulate_modal_window_open_for_testing_ = false;
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_PORT_H_