Use sk_sp-based APIs for SkColorFilter

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

 // 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:
 //
 //    * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //    * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
@@ skipping 112 matching lines @@
     Color m_strokeColor;
     RefPtr<Gradient> m_strokeGradient;
 
     Color m_fillColor;
     RefPtr<Gradient> m_fillGradient;
 
     RefPtr<SkDrawLooper> m_looper;
 
     TextDrawingModeFlags m_textDrawingMode;
 
-    RefPtr<SkColorFilter> m_colorFilter;
+    sk_sp<SkColorFilter> m_colorFilter;
 
     InterpolationQuality m_interpolationQuality;
 
     uint16_t m_saveCount;
 
     bool m_shouldAntialias : 1;
 };
 
 } // namespace blink
 
 #endif // GraphicsContextState_h