Clean up creation of "detached" SVG* data type objects

third_party/WebKit/Source/core/svg/SVGPreserveAspectRatioTearOff.h

 /*
  * Copyright (C) 2014 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
@@ skipping 61 matching lines @@
   enum {
     kSvgMeetorsliceUnknown = SVGPreserveAspectRatio::kSvgMeetorsliceUnknown,
     kSvgMeetorsliceMeet = SVGPreserveAspectRatio::kSvgMeetorsliceMeet,
     kSvgMeetorsliceSlice = SVGPreserveAspectRatio::kSvgMeetorsliceSlice
   };
 
   static SVGPreserveAspectRatioTearOff* Create(
       SVGPreserveAspectRatio* target,
       SVGElement* context_element,
       PropertyIsAnimValType property_is_anim_val,
-      const QualifiedName& attribute_name = QualifiedName::Null()) {
+      const QualifiedName& attribute_name) {
     return new SVGPreserveAspectRatioTearOff(
         target, context_element, property_is_anim_val, attribute_name);
   }
 
   void setAlign(unsigned short, ExceptionState&);
   unsigned short align() { return Target()->Align(); }
   void setMeetOrSlice(unsigned short, ExceptionState&);
   unsigned short meetOrSlice() { return Target()->MeetOrSlice(); }
 
   DECLARE_VIRTUAL_TRACE_WRAPPERS();
 
  private:
-  SVGPreserveAspectRatioTearOff(
-      SVGPreserveAspectRatio*,
-      SVGElement* context_element,
-      PropertyIsAnimValType,
-      const QualifiedName& attribute_name = QualifiedName::Null());
+  SVGPreserveAspectRatioTearOff(SVGPreserveAspectRatio*,
+                                SVGElement* context_element,
+                                PropertyIsAnimValType,
+                                const QualifiedName& attribute_name);
 };
 
 }  // namespace blink
 
 #endif  // SVGPreserveAspectRatioTearOff_h