Replace NinePieceImage.setMaskDefault with static method.

third_party/WebKit/Source/core/style/StyleReflection.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 35 matching lines @@
 
   CSSReflectionDirection Direction() const { return direction_; }
   Length Offset() const { return offset_; }
   const NinePieceImage& Mask() const { return mask_; }
 
   void SetDirection(CSSReflectionDirection dir) { direction_ = dir; }
   void SetOffset(const Length& length) { offset_ = length; }
   void SetMask(const NinePieceImage& image) { mask_ = image; }
 
  private:
-  StyleReflection() : direction_(kReflectionBelow), offset_(0, kFixed) {
-    mask_.SetMaskDefaults();
-  }
+  StyleReflection()
+      : direction_(kReflectionBelow),
+        offset_(0, kFixed),
+        mask_(NinePieceImage::MaskDefaults()) {}
 
   CSSReflectionDirection direction_;
   Length offset_;
   NinePieceImage mask_;
 };
 
 }  // namespace blink
 
 #endif  // StyleReflection_h