Adding Ozone CursorLoader and necessary API functions to allow setting the cursor in SoftwareFactor…

ui/base/cursor/cursor_loader_null.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_BASE_CURSOR_CURSOR_LOADER_NULL_H_
-#define UI_BASE_CURSOR_CURSOR_LOADER_NULL_H_
-
-#include "base/compiler_specific.h"
-#include "ui/base/cursor/cursor_loader.h"
-#include "ui/base/ui_base_export.h"
-
-namespace ui {
-
-class UI_BASE_EXPORT CursorLoaderNull : public CursorLoader {
- public:
-  CursorLoaderNull();
-  virtual ~CursorLoaderNull();
-
-  // Overridden from CursorLoader:
-  virtual void LoadImageCursor(int id,
-                               int resource_id,
-                               const gfx::Point& hot) OVERRIDE;
-  virtual void LoadAnimatedCursor(int id,
-                                  int resource_id,
-                                  const gfx::Point& hot,
-                                  int frame_delay_ms) OVERRIDE;
-  virtual void UnloadAll() OVERRIDE;
-  virtual void SetPlatformCursor(gfx::NativeCursor* cursor) OVERRIDE;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(CursorLoaderNull);
-};
-
-}  // namespace ui
-
-#endif  // UI_BASE_CURSOR_CURSOR_LOADER_NULL_H_