cc: Move SkShader construction to a single spot in PaintShader

third_party/WebKit/Source/platform/graphics/Gradient.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Torch Mobile, Inc.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 84 matching lines @@
   }
   void AddColorStops(const Vector<Gradient::ColorStop>&);
 
   void ApplyToFlags(PaintFlags&, const SkMatrix& local_matrix);
 
  protected:
   Gradient(Type, GradientSpreadMethod, ColorInterpolation);
 
   using ColorBuffer = Vector<SkColor, 8>;
   using OffsetBuffer = Vector<SkScalar, 8>;
-  virtual sk_sp<SkShader> CreateShader(const ColorBuffer&,
-                                       const OffsetBuffer&,
-                                       SkShader::TileMode,
-                                       uint32_t flags,
-                                       const SkMatrix&) const = 0;
+  virtual std::unique_ptr<PaintShader> CreateShader(const ColorBuffer&,
+                                                    const OffsetBuffer&,
+                                                    SkShader::TileMode,
+                                                    uint32_t flags,
+                                                    const SkMatrix&,
+                                                    SkColor) const = 0;
 
  private:
-  sk_sp<PaintShader> CreateShaderInternal(const SkMatrix& local_matrix);
+  std::unique_ptr<PaintShader> CreateShaderInternal(
+      const SkMatrix& local_matrix);
 
   void SortStopsIfNecessary();
   void FillSkiaStops(ColorBuffer&, OffsetBuffer&) const;
 
   const Type type_;
   const GradientSpreadMethod spread_method_;
   const ColorInterpolation color_interpolation_;
 
   Vector<ColorStop, 2> stops_;
   bool stops_sorted_;
 
-  mutable sk_sp<PaintShader> cached_shader_;
+  mutable std::unique_ptr<PaintShader> cached_shader_;
 };
 
 }  // namespace blink
 
 #endif