CC Animation: Erase cc::LayerSettings everywhere.

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 fd3c1a22d9a63e72854e739d55521d9d85995403..88dd2c91b7e82a9844b00ddf130eed8fe723b10e 100644
--- a/cc/layers/picture_image_layer.h
+++ b/cc/layers/picture_image_layer.h
@@ -20,7 +20,7 @@ namespace cc {
 
 class CC_EXPORT PictureImageLayer : public PictureLayer, ContentLayerClient {
  public:
-  static scoped_refptr<PictureImageLayer> Create(const LayerSettings& settings);
+  static scoped_refptr<PictureImageLayer> Create();
 
   void SetImage(skia::RefPtr<const SkImage> image);
 
@@ -39,7 +39,7 @@ class CC_EXPORT PictureImageLayer : public PictureLayer, ContentLayerClient {
   bool HasDrawableContent() const override;
 
  private:
-  explicit PictureImageLayer(const LayerSettings& settings);
+  PictureImageLayer();
   ~PictureImageLayer() override;
 
   skia::RefPtr<const SkImage> image_;