ozone: Handle default cursors with no bitmap in BitmapCursorFactoryOzone

ui/base/cursor/ozone/bitmap_cursor_factory_ozone.h

 // Copyright 2014 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_BASE_CURSOR_OZONE_BITMAP_CURSOR_FACTORY_OZONE_H_
 #define UI_BASE_CURSOR_OZONE_BITMAP_CURSOR_FACTORY_OZONE_H_
 
 #include <map>
 
 #include "base/memory/ref_counted.h"
@@ skipping 42 matching lines @@
       PlatformCursor platform_cursor);
 
   // CursorFactoryOzone:
   virtual PlatformCursor GetDefaultCursor(int type) OVERRIDE;
   virtual PlatformCursor CreateImageCursor(const SkBitmap& bitmap,
                                            const gfx::Point& hotspot) OVERRIDE;
   virtual void RefImageCursor(PlatformCursor cursor) OVERRIDE;
   virtual void UnrefImageCursor(PlatformCursor cursor) OVERRIDE;
 
  private:
+  // Get cached BitmapCursorOzone for a default cursor.
+  scoped_refptr<BitmapCursorOzone> GetDefaultCursorInternal(int type);
+
   // Default cursors are cached & owned by the factory.
   typedef std::map<int, scoped_refptr<BitmapCursorOzone> > DefaultCursorMap;
   DefaultCursorMap default_cursors_;
 
   DISALLOW_COPY_AND_ASSIGN(BitmapCursorFactoryOzone);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_CURSOR_OZONE_BITMAP_CURSOR_FACTORY_OZONE_H_