Replace NinePieceImage.setMaskDefault with static method.

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

Index: third_party/WebKit/Source/core/style/StyleReflection.h
diff --git a/third_party/WebKit/Source/core/style/StyleReflection.h b/third_party/WebKit/Source/core/style/StyleReflection.h
index 97fdef0d86f3bedf039027518e3397ff8d459e61..8d45c4afef5fa7609c5b5a784f0a484f2e033a1d 100644
--- a/third_party/WebKit/Source/core/style/StyleReflection.h
+++ b/third_party/WebKit/Source/core/style/StyleReflection.h
@@ -53,9 +53,10 @@ class StyleReflection : public RefCounted<StyleReflection> {
   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_;