Convert //cc from scoped_ptr to std::unique_ptr.

cc/blink/scrollbar_impl.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 CC_BLINK_SCROLLBAR_IMPL_H_
 #define CC_BLINK_SCROLLBAR_IMPL_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "cc/input/scrollbar.h"
 #include "third_party/WebKit/public/platform/WebScrollbarThemePainter.h"
 
 namespace blink {
 class WebScrollbar;
 class WebScrollbarThemeGeometry;
 }
 
 namespace cc_blink {
 
 class ScrollbarImpl : public cc::Scrollbar {
  public:
-  ScrollbarImpl(scoped_ptr<blink::WebScrollbar> scrollbar,
+  ScrollbarImpl(std::unique_ptr<blink::WebScrollbar> scrollbar,
                 blink::WebScrollbarThemePainter painter,
-                scoped_ptr<blink::WebScrollbarThemeGeometry> geometry);
+                std::unique_ptr<blink::WebScrollbarThemeGeometry> geometry);
   ~ScrollbarImpl() override;
 
   // cc::Scrollbar implementation.
   cc::ScrollbarOrientation Orientation() const override;
   bool IsLeftSideVerticalScrollbar() const override;
   bool HasThumb() const override;
   bool IsOverlay() const override;
   gfx::Point Location() const override;
   int ThumbThickness() const override;
   int ThumbLength() const override;
   gfx::Rect TrackRect() const override;
   float ThumbOpacity() const override;
   bool NeedsPaintPart(cc::ScrollbarPart part) const override;
   void PaintPart(SkCanvas* canvas,
                  cc::ScrollbarPart part,
                  const gfx::Rect& content_rect) override;
 
  private:
-  scoped_ptr<blink::WebScrollbar> scrollbar_;
+  std::unique_ptr<blink::WebScrollbar> scrollbar_;
   blink::WebScrollbarThemePainter painter_;
-  scoped_ptr<blink::WebScrollbarThemeGeometry> geometry_;
+  std::unique_ptr<blink::WebScrollbarThemeGeometry> geometry_;
 
   DISALLOW_COPY_AND_ASSIGN(ScrollbarImpl);
 };
 
 }  // namespace cc_blink
 
 #endif  // CC_BLINK_SCROLLBAR_IMPL_H_