Fixing new SVG test on IE.

tests/html/svgelement_test.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.
 
 library SvgElementTest;
 import "package:expect/expect.dart";
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 import 'dart:svg' as svg;
@@ skipping 417 matching lines @@
       var element = new svg.RectElement();
       element.attributes['width'] = '100';
       element.attributes['height'] = '100';
       var root = new svg.SvgSvgElement();
       root.append(element);
 
       document.body.append(root);
 
       var rect = element.getBoundingClientRect();
       expect(rect is Rect, isTrue);
-      expect(rect.width, 100);
-      expect(rect.height, 100);
+      expect(rect.width, closeTo(100, 1));
+      expect(rect.height, closeTo(100, 1));
     });
   });
 }