Converting Element.client*, offset* and Screen.avail* over to Rects

sdk/lib/svg/dart2js/svg_dart2js.dart

Index: sdk/lib/svg/dart2js/svg_dart2js.dart
diff --git a/sdk/lib/svg/dart2js/svg_dart2js.dart b/sdk/lib/svg/dart2js/svg_dart2js.dart
index e09bc4aa58d9b6ae69974fa8c02f39fe97abcfca..7e0714362702724b7938b2507697ad9c8992d18b 100644
--- a/sdk/lib/svg/dart2js/svg_dart2js.dart
+++ b/sdk/lib/svg/dart2js/svg_dart2js.dart
@@ -5456,9 +5456,10 @@ class StopElement extends StyledElement native "*SVGStopElement" {
   @DocsEditable
   factory StopElement() => _SvgElementFactoryProvider.createSvgElement_tag("stop");
 
+  @JSName('offset')
   @DomName('SVGStopElement.offset')
   @DocsEditable
-  final AnimatedNumber offset;
+  final AnimatedNumber gradientOffset;
 }
 // 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
@@ -7413,9 +7414,10 @@ class _SVGComponentTransferFunctionElement extends SvgElement native "*SVGCompon
   @DocsEditable
   final AnimatedNumber intercept;
 
+  @JSName('offset')
   @DomName('SVGComponentTransferFunctionElement.offset')
   @DocsEditable
-  final AnimatedNumber offset;
+  final AnimatedNumber gradientOffset;
 
   @DomName('SVGComponentTransferFunctionElement.slope')
   @DocsEditable