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

cc/layers/nine_patch_layer.h

Index: cc/layers/nine_patch_layer.h
diff --git a/cc/layers/nine_patch_layer.h b/cc/layers/nine_patch_layer.h
index 20b5e4934149f3fffc1343ca15626e49cf75c6bd..1c2d7259e3e5b33e0f1cac97d13bc1839723b47e 100644
--- a/cc/layers/nine_patch_layer.h
+++ b/cc/layers/nine_patch_layer.h
@@ -5,8 +5,9 @@
 #ifndef CC_LAYERS_NINE_PATCH_LAYER_H_
 #define CC_LAYERS_NINE_PATCH_LAYER_H_
 
+#include <memory>
+
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/ui_resource_layer.h"
@@ -44,7 +45,7 @@ class CC_EXPORT NinePatchLayer : public UIResourceLayer {
  private:
   NinePatchLayer();
   ~NinePatchLayer() override;
-  scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
+  std::unique_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
 
   gfx::Rect border_;
   bool fill_center_;