Replace many skia::RefPtr with sk_sp<> in cc/

cc/layers/picture_image_layer.h

Index: cc/layers/picture_image_layer.h
diff --git a/cc/layers/picture_image_layer.h b/cc/layers/picture_image_layer.h
index 0ba03e991e9fb1ca0186d70ac2a330ff40d7fb49..62ff506843a0a2ee404c7d354b6edef39dd5c77b 100644
--- a/cc/layers/picture_image_layer.h
+++ b/cc/layers/picture_image_layer.h
@@ -12,6 +12,7 @@
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_layer.h"
 #include "skia/ext/refptr.h"
+#include "third_party/skia/include/core/SkRefCnt.h"
 #include "ui/gfx/geometry/size.h"
 
 class SkImage;
@@ -22,7 +23,7 @@ class CC_EXPORT PictureImageLayer : public PictureLayer, ContentLayerClient {
  public:
   static scoped_refptr<PictureImageLayer> Create();
 
-  void SetImage(skia::RefPtr<const SkImage> image);
+  void SetImage(sk_sp<const SkImage> image);
 
   // Layer implementation.
   std::unique_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
@@ -42,7 +43,7 @@ class CC_EXPORT PictureImageLayer : public PictureLayer, ContentLayerClient {
   PictureImageLayer();
   ~PictureImageLayer() override;
 
-  skia::RefPtr<const SkImage> image_;
+  sk_sp<const SkImage> image_;
 
   DISALLOW_COPY_AND_ASSIGN(PictureImageLayer);
 };