Sky: Added radial gradients.

sky/engine/core/painting/Shader.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SKY_ENGINE_CORE_PAINTING_SHADER_H_
 #define SKY_ENGINE_CORE_PAINTING_SHADER_H_
 
 #include "sky/engine/tonic/dart_wrappable.h"
 #include "sky/engine/wtf/PassRefPtr.h"
 #include "sky/engine/wtf/RefCounted.h"
 #include "third_party/skia/include/core/SkShader.h"
 
 namespace blink {
 
 class Shader : public RefCounted<Shader>, public DartWrappable {
   DEFINE_WRAPPERTYPEINFO();
  public:
   ~Shader() override;
 
   SkShader* shader() { return shader_.get(); }
+  void set_shader(PassRefPtr<SkShader> shader) { shader_ = shader; }
 
  protected:
   Shader(PassRefPtr<SkShader> shader);
 
  private:
   RefPtr<SkShader> shader_;
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_CORE_PAINTING_SHADER_H_