Fix Mac custom cursor color.

ui/gfx/native_widget_types.h

 // Copyright (c) 2012 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 UI_GFX_NATIVE_WIDGET_TYPES_H_
 #define UI_GFX_NATIVE_WIDGET_TYPES_H_
 #pragma once
 
 #include "build/build_config.h"
 
@@ skipping 39 matching lines @@
 }
 #endif  // defined(USE_AURA)
 
 #if defined(OS_WIN)
 #include <windows.h>  // NOLINT
 typedef struct HFONT__* HFONT;
 struct IAccessible;
 #elif defined(OS_MACOSX)
 struct CGContext;
 #ifdef __OBJC__
+@class NSCursor;
 @class NSEvent;
 @class NSFont;
 @class NSImage;
 @class NSView;
 @class NSWindow;
 @class NSTextField;
 #else
+class NSCursor;
 class NSEvent;
 class NSFont;
 class NSImage;
 struct NSView;
 class NSWindow;
 class NSTextField;
 #endif  // __OBJC__
 #elif defined(OS_POSIX)
 typedef struct _PangoFontDescription PangoFontDescription;
 typedef struct _cairo cairo_t;
@@ skipping 29 matching lines @@
 typedef aura::Window* NativeWindow;
 typedef SkRegion* NativeRegion;
 typedef aura::Event* NativeEvent;
 #elif defined(OS_WIN)
 typedef HCURSOR NativeCursor;
 typedef HWND NativeView;
 typedef HWND NativeWindow;
 typedef HRGN NativeRegion;
 typedef MSG NativeEvent;
 #elif defined(OS_MACOSX)
-typedef void* NativeCursor;
+typedef NSCursor* NativeCursor;
 typedef NSView* NativeView;
 typedef NSWindow* NativeWindow;
 typedef NSEvent* NativeEvent;
 #elif defined(USE_WAYLAND)
 typedef void* NativeCursor;
 typedef ui::WaylandWindow* NativeView;
 typedef ui::WaylandWindow* NativeWindow;
 // TODO(dnicoara) This should be replaced with a cairo region or maybe
 // a Wayland specific region
 typedef GdkRegion* NativeRegion;
@@ skipping 170 matching lines @@
 #elif defined(OS_ANDROID)
 typedef uint64 AcceleratedWidget;
 const AcceleratedWidget kNullAcceleratedWidget = 0;
 #else
 #error unknown platform
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GFX_NATIVE_WIDGET_TYPES_H_