Don't use SDK summaries with embedders (#26448).

pkg/analyzer_cli/test/embedder_test.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:io';
 
+import 'package:analyzer/src/generated/sdk_io.dart';
 import 'package:analyzer_cli/src/driver.dart' show Driver, errorSink, outSink;
 import 'package:path/path.dart' as path;
 import 'package:unittest/unittest.dart';
 
 import 'utils.dart';
 
 main() {
   initializeTestEnvironment();
 
   group('_embedder.yaml', () {
@@ skipping 17 matching lines @@
       var testDir = path.join(testDirectory, 'data', 'embedder_client');
       new Driver().start([
         '--packages',
         path.join(testDir, '_packages'),
         path.join(testDir, 'embedder_yaml_user.dart')
       ]);
 
       expect(exitCode, 0);
       expect(outSink.toString(), contains('No issues found'));
     }));
+
+    test('sdk setup', wrap(() {
+      var testDir = path.join(testDirectory, 'data', 'embedder_client');
+      Driver driver = new Driver();
+      driver.start([
+        '--packages',
+        path.join(testDir, '_packages'),
+        path.join(testDir, 'embedder_yaml_user.dart')
+      ]);
+
+      DirectoryBasedDartSdk sdk = driver.sdk;
+      expect(sdk.useSummary, false);
+    }));
   });
 }
 
 /// Wrap a function call to dump stdout and stderr in case of an exception.
 Function wrap(Function f) {
   return () {
     try {
       f();
     } catch (e) {
       if (outSink.toString().isNotEmpty) {
         print('stdout:');
         print(outSink);
       }
       if (errorSink.toString().isNotEmpty) {
         print('stderr:');
         print(errorSink);
       }
       throw e;
     }
   };
 }