Remove use of deprecated test methods (asynctTest/callbackDone/expectThrows).

dom/GeolocationTest.dart

 #library('GeolocationTest');
 #import("../../../../../dart/pkg/unittest/lib/unittest.dart");
 #import("../../../../../dart/pkg/unittest/lib/html_config.dart");
 #import('dart:html');
 
 main() {
   useHtmlConfiguration(true);
 
   errorCallback(error) => Expect.fail('${error.code}: ${error.message}');
 
-  asyncTest('geolocation.getCurrentPosition', 1, () {
+  test('geolocation.getCurrentPosition', () {
     final geolocation = window.navigator.geolocation;
 
-    geolocation.getCurrentPosition((posA) {
-      window.setTimeout(() {
-        geolocation.getCurrentPosition((posB) {
+    geolocation.getCurrentPosition(expectAsync1((posA) {
+      window.setTimeout(expectAsync0(() {
+        geolocation.getCurrentPosition(expectAsync1((posB) {
           Expect.equals(posA.coords.longitude, posB.coords.longitude);
-          callbackDone();
-        }, errorCallback);
-      }, 0);
-    }, errorCallback);
+        }), errorCallback);
+      }), 0);
+    }), errorCallback);
   });
 
-  asyncTest('geolocation.watchPosition', 1, () {
+  test('geolocation.watchPosition', () {
     final geolocation = window.navigator.geolocation;
 
-    geolocation.getCurrentPosition((posA) {
-      window.setTimeout(() {
-        geolocation.watchPosition((posB) {
+    geolocation.getCurrentPosition(expectAsync1((posA) {
+      window.setTimeout(expectAsync0(() {
+        geolocation.watchPosition(expectAsync1((posB) {
           Expect.equals(posA.coords.longitude, posB.coords.longitude);
-          callbackDone();
-        }, errorCallback);
-      }, 0);
-    }, errorCallback);
+        }), errorCallback);
+      }), 0);
+    }), errorCallback);
   });
 }