Don't propose fixes to update SDK sources.

pkg/analysis_server/test/services/correction/fix_test.dart

 // Copyright (c) 2014, 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.
 
 library test.services.correction.fix;
 
 import 'package:analysis_server/src/protocol.dart' hide AnalysisError;
 import 'package:analysis_server/src/services/correction/fix.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/local_memory_index.dart';
@@ skipping 434 matching lines @@
     _indexTestUnit('''
 class A {
   A._named(p);
 }
 class B extends A {
 }
 ''');
     assertNoFix(FixKind.CREATE_CONSTRUCTOR_SUPER);
   }
 
+  void test_createField_BAD_inSDK() {
+    _indexTestUnit('''
+main(List p) {
+  p.foo = 1;
+}
+''');
+    assertNoFix(FixKind.CREATE_FIELD);
+  }
+
   void test_createField_getter_multiLevel() {
     _indexTestUnit('''
 class A {
 }
 class B {
   A a;
 }
 class C {
   B b;
 }
@@ skipping 279 matching lines @@
     change = fix.change;
     // validate change
     List<SourceFileEdit> fileEdits = change.edits;
     expect(fileEdits, hasLength(1));
     SourceFileEdit fileEdit = change.edits[0];
     expect(fileEdit.file, '/my/project/bin/my_file.dart');
     expect(fileEdit.fileStamp, -1);
     expect(fileEdit.edits[0].replacement, contains('library my.file;'));
   }
 
+  void test_createGetter_BAD_inSDK() {
+    _indexTestUnit('''
+main(List p) {
+  int v = p.foo;
+}
+''');
+    assertNoFix(FixKind.CREATE_GETTER);
+  }
+
   void test_createGetter_multiLevel() {
     _indexTestUnit('''
 class A {
 }
 class B {
   A a;
 }
 class C {
   B b;
 }
@@ skipping 1576 matching lines @@
 }
 ''');
     assertHasFix(FixKind.CHANGE_TO, '''
 myFunction() {}
 main() {
   myFunction();
 }
 ''');
   }
 
+  void test_undefinedMethod_create_BAD_inSDK() {
+    _indexTestUnit('''
+main() {
+  List.foo();
+}
+''');
+    assertNoFix(FixKind.CREATE_METHOD);
+  }
+
   void test_undefinedMethod_create_generic_BAD() {
     _indexTestUnit('''
 class A<T> {
   B b;
   Map<int, T> items;
   main() {
     b.process(items);
   }
 }
 
@@ skipping 426 matching lines @@
       positions.add(new Position(testFile, offset));
     }
     return positions;
   }
 
   void _indexTestUnit(String code) {
     resolveTestUnit(code);
     index.indexUnit(context, testUnit);
   }
 }