Switch to using expectAsync0() to address some deprecation warnings.

pkg/analyzer_plugin/test/integration/support/integration_tests.dart

Index: pkg/analyzer_plugin/test/integration/support/integration_tests.dart
diff --git a/pkg/analyzer_plugin/test/integration/support/integration_tests.dart b/pkg/analyzer_plugin/test/integration/support/integration_tests.dart
index 80c7a2041abb0630a90435cec030858b5ea51ace..99f7b0d9a2105fe3f8c0e19ff8a40151b695a203 100644
--- a/pkg/analyzer_plugin/test/integration/support/integration_tests.dart
+++ b/pkg/analyzer_plugin/test/integration/support/integration_tests.dart
@@ -719,7 +719,7 @@ class Server {
     // and is outputting a stacktrace, because it ensures that we see the
     // entire stacktrace.  Use expectAsync() to prevent the test from
     // ending during this 1 second.
-    new Future.delayed(new Duration(seconds: 1), expectAsync(() {
+    new Future.delayed(new Duration(seconds: 1), expectAsync0(() {
       fail('Bad data received from server: $details');
     }));
   }