pkg/unittest: reverting part of r35954 due to usage in Webkit layout tests

pkg/unittest/lib/unittest.dart

Index: pkg/unittest/lib/unittest.dart
diff --git a/pkg/unittest/lib/unittest.dart b/pkg/unittest/lib/unittest.dart
index 05eca70f9fcc558fda37b68ee17d2ea35d2c2d3b..e538dd5c76d8d4c290b69608ecb293658196623c 100644
--- a/pkg/unittest/lib/unittest.dart
+++ b/pkg/unittest/lib/unittest.dart
@@ -301,6 +301,22 @@ Function expectAsync(Function callback,
     {int count: 1, int max: 0, String id}) =>
   new _SpreadArgsHelper(callback, count, max, id).func;
 
+/// *Deprecated*
+///
+/// Use [expectAsync] instead.
+@deprecated
+Function expectAsync0(Function callback,
+                     {int count: 1, int max: 0, String id}) =>
+    expectAsync(callback, count: count, max: max, id: id);
+
+/// *Deprecated*
+///
+/// Use [expectAsync] instead.
+@deprecated
+Function expectAsync1(Function callback,
+                     {int count: 1, int max: 0, String id}) =>
+    expectAsync(callback, count: count, max: max, id: id);
+
 /// Indicate that [callback] is expected to be called until [isDone] returns
 /// true. The unittest framework check [isDone] after each callback and only
 /// when it returns true will it continue with the following test. Using