Making readonly fields on interfaces be readonly

sdk/lib/svg/dart2js/svg_dart2js.dart

 /**
  * Scalable Vector Graphics:
  * Two-dimensional vector graphics with support for events and animation.
  *
  * For details about the features and syntax of SVG, a W3C standard,
  * refer to the
  * [Scalable Vector Graphics Specification](http://www.w3.org/TR/SVG/).
  */
 library dart.dom.svg;
 
@@ skipping 1421 matching lines @@
 @DocsEditable()
 @DomName('SVGExternalResourcesRequired')
 @Unstable()
 abstract class ExternalResourcesRequired extends Interceptor {
   // To suppress missing implicit constructor warnings.
   factory ExternalResourcesRequired._() { throw new UnsupportedError("Not supported"); }
 
   /// Checks if this type is supported on the current platform.
   static bool supported(SvgElement element) => JS('bool', '#.externalResourcesRequired !== undefined && #.externalResourcesRequired.animVal !== undefined', element, element);
 
-  AnimatedBoolean externalResourcesRequired;
+  final AnimatedBoolean externalResourcesRequired;
 }
 // Copyright (c) 2012, 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.
 
 
 @DocsEditable()
 @DomName('SVGFEBlendElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
@@ skipping 1552 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable()
 @DomName('SVGFilterPrimitiveStandardAttributes')
 @Unstable()
 abstract class FilterPrimitiveStandardAttributes extends Interceptor {
   // To suppress missing implicit constructor warnings.
   factory FilterPrimitiveStandardAttributes._() { throw new UnsupportedError("Not supported"); }
 
-  AnimatedLength height;
+  final AnimatedLength height;
 
-  AnimatedString result;
+  final AnimatedString result;
 
-  AnimatedLength width;
+  final AnimatedLength width;
 
-  AnimatedLength x;
+  final AnimatedLength x;
 
-  AnimatedLength y;
+  final AnimatedLength y;
 }
 // Copyright (c) 2012, 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.
 
 
 @DocsEditable()
 @DomName('SVGFitToViewBox')
 @Unstable()
 abstract class FitToViewBox extends Interceptor {
   // To suppress missing implicit constructor warnings.
   factory FitToViewBox._() { throw new UnsupportedError("Not supported"); }
 
-  AnimatedPreserveAspectRatio preserveAspectRatio;
+  final AnimatedPreserveAspectRatio preserveAspectRatio;
 
-  AnimatedRect viewBox;
+  final AnimatedRect viewBox;
 }
 // Copyright (c) 2012, 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.
 
 
 @DocsEditable()
 @DomName('SVGForeignObjectElement')
 @SupportedBrowser(SupportedBrowser.CHROME)
 @SupportedBrowser(SupportedBrowser.FIREFOX)
@@ skipping 3344 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable()
 @DomName('SVGTests')
 @Unstable()
 abstract class Tests extends Interceptor {
   // To suppress missing implicit constructor warnings.
   factory Tests._() { throw new UnsupportedError("Not supported"); }
 
-  StringList requiredExtensions;
+  final StringList requiredExtensions;
 
-  StringList requiredFeatures;
+  final StringList requiredFeatures;
 
-  StringList systemLanguage;
+  final StringList systemLanguage;
 
   bool hasExtension(String extension);
 }
 // Copyright (c) 2012, 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.
 
 
 @DocsEditable()
 @DomName('SVGTextContentElement')
@@ skipping 416 matching lines @@
 // BSD-style license that can be found in the LICENSE file.
 
 
 @DocsEditable()
 @DomName('SVGURIReference')
 @Unstable()
 abstract class UriReference extends Interceptor {
   // To suppress missing implicit constructor warnings.
   factory UriReference._() { throw new UnsupportedError("Not supported"); }
 
-  AnimatedString href;
+  final AnimatedString href;
 }
 // Copyright (c) 2012, 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.
 
 
 @DocsEditable()
 @DomName('SVGUseElement')
 @Unstable()
 class UseElement extends GraphicsElement implements UriReference, ExternalResourcesRequired, Tests native "SVGUseElement" {
@@ skipping 723 matching lines @@
   @DomName('SVGVKernElement.SVGVKernElement')
   @DocsEditable()
   factory _SVGVKernElement() => _SvgElementFactoryProvider.createSvgElement_tag("vkern");
   /**
    * Constructor instantiated by the DOM when a custom element has been created.
    *
    * This can only be called by subclasses from their created constructor.
    */
   _SVGVKernElement.created() : super.created();
 }