Replace expect() with outOfTestExpect() in Analysis Server performance benchmark.

pkg/analysis_server/tool/spec/codegen_inttest_methods.dart

Index: pkg/analysis_server/tool/spec/codegen_inttest_methods.dart
diff --git a/pkg/analysis_server/tool/spec/codegen_inttest_methods.dart b/pkg/analysis_server/tool/spec/codegen_inttest_methods.dart
index 50bbb4ec8c48bfefa10b7a1e450fb75bd3262b80..b734061958318494895fb4492f48e3500cbbd4db 100644
--- a/pkg/analysis_server/tool/spec/codegen_inttest_methods.dart
+++ b/pkg/analysis_server/tool/spec/codegen_inttest_methods.dart
@@ -179,7 +179,7 @@ class CodegenInttestMethodsVisitor extends DartCodegenVisitor
       indent(() {
         String paramsValidator = camelJoin(
             ['is', notification.domainName, notification.event, 'params']);
-        writeln('expect(params, $paramsValidator);');
+        writeln('outOfTestExpect(params, $paramsValidator);');
         String constructorCall;
         if (notification.params == null) {
           constructorCall = 'new $className()';
@@ -255,7 +255,7 @@ class CodegenInttestMethodsVisitor extends DartCodegenVisitor
         writeln('ResponseDecoder decoder = new ResponseDecoder($kind);');
         writeln("return new $resultClass.fromJson(decoder, 'result', result);");
       } else {
-        writeln('expect(result, isNull);');
+        writeln('outOfTestExpect(result, isNull);');
         writeln('return null;');
       }
     });