Revert of Switch Blink SkShader clients to sk_sp

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

 // Copyright 2014 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 ImagePattern_h
 #define ImagePattern_h
 
 #include "platform/graphics/Pattern.h"
 
 class SkImage;
 
 namespace blink {
 
 class Image;
 
 class PLATFORM_EXPORT ImagePattern final : public Pattern {
 public:
     static PassRefPtr<ImagePattern> create(PassRefPtr<Image>, RepeatMode);
 
     bool isTextureBacked() const override;
 
 protected:
-    sk_sp<SkShader> createShader() override;
+    PassRefPtr<SkShader> createShader() override;
 
 private:
     ImagePattern(PassRefPtr<Image>, RepeatMode);
 
     RefPtr<SkImage> m_tileImage;
 };
 
 } // namespace blink
 
 #endif  /* ImagePattern_h */