Adding supported checks for CssMatrix and Point.

tests/html/css_test.dart

 library CssTest;
 import '../../pkg/unittest/lib/unittest.dart';
-import '../../pkg/unittest/lib/html_config.dart';
+import '../../pkg/unittest/lib/html_individual_config.dart';
 import 'dart:html';
 
 main() {
-  useHtmlConfiguration();
-  test('CssMatrix', () {
-    CssMatrix matrix1 = new CssMatrix();
-    expect(matrix1.m11.round(), equals(1));
-    expect(matrix1.m12.round(), isZero);
+  useHtmlIndividualConfiguration();
 
-    CssMatrix matrix2 = new CssMatrix('matrix(1, 0, 0, 1, -835, 0)');
-    expect(matrix2.a.round(), equals(1));
-    expect(matrix2.e.round(), equals(-835));
+  group('supported_CssMatrix', () {
+    test('supported', () {
+      expect(CssMatrix.supported, true);
+    });
   });
-  test('Point', () {
-    Element element = new Element.tag('div');
-    element.attributes['style'] =
-      '''
-      position: absolute;
-      width: 60px;
-      height: 100px;
-      left: 0px;
-      top: 0px;
-      background-color: red;
-      -webkit-transform: translate3d(250px, 100px, 0px) perspective(500px) rotateX(30deg);
-      ''';
-    document.body.nodes.add(element);
 
-    Point point = new Point(5, 2);
-    checkPoint(5, 2, point);
-    checkPoint(256, 110, window.webkitConvertPointFromNodeToPage(element, point));
-    point.y = 100;
-    checkPoint(5, 100, point);
-    checkPoint(254, 196, window.webkitConvertPointFromNodeToPage(element, point));
+  group('supported_DomPoint', () {
+    test('supported', () {
+      expect(DomPoint.supported, true);
+    });
+  });
+
+  group('functional', () {
+    test('CssMatrix', () {
+      var expectation = CssMatrix.supported ? returnsNormally : throws;
+      expect(() {
+        CssMatrix matrix1 = new CssMatrix();
+        expect(matrix1.m11.round(), equals(1));
+        expect(matrix1.m12.round(), isZero);
+
+        CssMatrix matrix2 = new CssMatrix('matrix(1, 0, 0, 1, -835, 0)');
+        expect(matrix2.a.round(), equals(1));
+        expect(matrix2.e.round(), equals(-835));
+      }, expectation);
+    });
+    test('DomPoint', () {
+      var expectation = DomPoint.supported ? returnsNormally : throws;
+      expect(() {
+        Element element = new Element.tag('div');
+        element.attributes['style'] =
+          '''
+          position: absolute;
+          width: 60px;
+          height: 100px;
+          left: 0px;
+          top: 0px;
+          background-color: red;
+          -webkit-transform: translate3d(250px, 100px, 0px);
+          ''';
+        document.body.nodes.add(element);
+
+        DomPoint point = new DomPoint(5, 2);
+        checkPoint(5, 2, point);
+        checkPoint(255, 102, window.convertPointFromNodeToPage(element, point));
+        point.y = 100;
+        checkPoint(5, 100, point);
+        checkPoint(255, 200, window.convertPointFromNodeToPage(element, point));
+      }, expectation);
+    });
   });
 }
 
-void checkPoint(expectedX, expectedY, Point point) {
+void checkPoint(expectedX, expectedY, DomPoint point) {
   expect(point.x.round(), equals(expectedX), reason: 'Wrong point.x');
   expect(point.y.round(), equals(expectedY), reason: 'Wrong point.y');
 }