Disable infer-from-overrides by default

test/checker/checker_test.dart

 // Copyright (c) 2015, 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.
 
 /// General type checking tests
 library dev_compiler.test.checker_test;
 
 import 'package:unittest/compact_vm_config.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 1665 matching lines @@
             B f4;
           }
 
           class Child extends Base {
             /*severe:InvalidMethodOverride*/A get f1 => null;
             C get f2 => null;
             get f3 => null;
             /*severe:InvalidMethodOverride*/dynamic get f4 => null;
           }
        '''
-    });
+    }, inferFromOverrides: true);
   });
 
   test('setter/setter override', () {
     testChecker({
       '/main.dart': '''
           class A {}
           class B extends A {}
           class C extends B {}
 
           abstract class Base {
@@ skipping 65 matching lines @@
 
           class Child extends Base {
             /*severe:InvalidMethodOverride*/A m1(A value) {}
             /*severe:InvalidMethodOverride*/C m2(C value) {}
             /*severe:InvalidMethodOverride*/A m3(C value) {}
             C m4(A value) {}
             m5(value) {}
             /*severe:InvalidMethodOverride*/dynamic m6(dynamic value) {}
           }
        '''
-    });
+    }, inferFromOverrides: true);
   });
 
   test('binary operators', () {
     testChecker({
       '/main.dart': '''
           class A {
             A operator *(B b) {}
             A operator /(B b) {}
             A operator ~/(B b) {}
             A operator %(B b) {}
@@ skipping 921 matching lines @@
         '/main.dart': '''
             class A {}
             class T1 implements A {
                 /*severe:InferableOverride*/toString() {}
             }
          '''
       }, inferFromOverrides: false);
     });
   });
 }