CC Animation: Erase cc::LayerSettings everywhere.

cc/layers/solid_color_layer.h

Index: cc/layers/solid_color_layer.h
diff --git a/cc/layers/solid_color_layer.h b/cc/layers/solid_color_layer.h
index 9a16f1a76f85143221a00115136b69c2f049b4a5..d1f108a681841f10c4692c15f01700c4fb2cd056 100644
--- a/cc/layers/solid_color_layer.h
+++ b/cc/layers/solid_color_layer.h
@@ -16,14 +16,14 @@ namespace cc {
 // SetBackgroundColor() on the base class.
 class CC_EXPORT SolidColorLayer : public Layer {
  public:
-  static scoped_refptr<SolidColorLayer> Create(const LayerSettings& settings);
+  static scoped_refptr<SolidColorLayer> Create();
 
   scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
 
   void SetBackgroundColor(SkColor color) override;
 
  protected:
-  explicit SolidColorLayer(const LayerSettings& settings);
+  SolidColorLayer();
 
  private:
   ~SolidColorLayer() override;