Break html_tests.dart into multiple tests

client/tests/client/html/MeasurementTest.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.
 
-void testMeasurement() { 
+#library('MeasurementTest');
+#import('../../../../lib/unittest/unittest.dart');
+#import('../../../../lib/unittest/html_config.dart');
+#import('dart:html');
+
+main() {
+  useHtmlConfiguration();
+
   asyncTest('measurement is async but before setTimout 0', 1, () {
     final element = document.body;
     bool timeout0 = false;
     bool fnComplete = false;
     bool animationFrame = false;
     window.setTimeout(() { timeout0 = true; }, 0);
     final computedStyle = element.computedStyle;
     computedStyle.then((style) {
       Expect.equals(style.getPropertyValue('left'), 'auto');
       Expect.isTrue(fnComplete);
@@ skipping 17 matching lines @@
     final element = document.body;
     rect = element.rect;
     computedStyle = element.computedStyle;
     Expect.isFalse(rect.isComplete);
     Expect.isFalse(computedStyle.isComplete);
   });
 
   // TODO(jacobr): add more tests that the results return by measurement
   // functions are correct.
 }