Moves over remaining .dart code references to 'factory' in interface declartions to 'default'

client/html/src/SVGSVGElement.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 interface SVGSVGElement extends SVGElement, SVGTests, SVGLangSpace, SVGExternalResourcesRequired, SVGStylable, SVGLocatable, SVGFitToViewBox, SVGZoomAndPan
-    factory SVGSVGElementWrappingImplementation {
+    default SVGSVGElementWrappingImplementation {
 
   SVGSVGElement();
 
   String get contentScriptType();
 
   void set contentScriptType(String value);
 
   String get contentStyleType();
 
   void set contentStyleType(String value);
@@ skipping 65 matching lines @@
   void setCurrentTime(num seconds);
 
   int suspendRedraw(int maxWaitMilliseconds);
 
   void unpauseAnimations();
 
   void unsuspendRedraw(int suspendHandleId);
 
   void unsuspendRedrawAll();
 }