Remove all uses of skia::RefPtr and stale includes

ui/gfx/scoped_sk_region.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_SCOPED_SK_REGION_H_
-#define UI_GFX_SCOPED_SK_REGION_H_
-
-#include "base/macros.h"
-#include "third_party/skia/include/core/SkRegion.h"
-
-namespace gfx {
-
-// Wraps an SkRegion.
-class ScopedSkRegion {
- public:
-  ScopedSkRegion() : region_(NULL) {}
-  explicit ScopedSkRegion(SkRegion* region) : region_(region) {}
-
-  ~ScopedSkRegion() {
-    delete region_;
-  }
-
-  void Set(SkRegion* region) {
-    delete region_;
-    region_ = region;
-  }
-
-  SkRegion* Get() {
-    return region_;
-  }
-
-  SkRegion* release() {
-    SkRegion* region = region_;
-    region_ = NULL;
-    return region;
-  }
-
- private:
-  SkRegion* region_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedSkRegion);
-};
-
-}  // namespace gfx
-
-#endif  // UI_GFX_SCOPED_SK_REGION_H_