fix #25220, infer generic type from constructor arguments

pkg/analyzer/test/src/summary/resynthesize_ast_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.
 
 library analyzer.test.src.summary.resynthesize_ast_test;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/generated/engine.dart'
@@ skipping 139 matching lines @@
   }
 
   @override
   @failingTest
   void test_circularReference_viaClosures_initializerTypes() {
     super.test_circularReference_viaClosures_initializerTypes();
   }
 
   @override
   @failingTest
+  void test_constructors_inferFromArguments() {
+    // TODO(jmesserly): does this need to be implemented in AST summaries?
+    // The test might need a change as well to not be based on local variable
+    // types, which don't seem to be available.
+    super.test_constructors_inferFromArguments();
+  }
+
+  @override
+  @failingTest
+  void test_constructors_inferFromArguments_const() {
+    super.test_constructors_inferFromArguments_const();
+  }
+
+  @override
+  @failingTest
+  void test_constructors_inferFromArguments_factory() {
+    super.test_constructors_inferFromArguments_factory();
+  }
+
+  @override
+  @failingTest
+  void test_constructors_inferFromArguments_named() {
+    super.test_constructors_inferFromArguments_named();
+  }
+
+  @override
+  @failingTest
+  void test_constructors_inferFromArguments_namedFactory() {
+    super.test_constructors_inferFromArguments_namedFactory();
+  }
+
+  @override
+  @failingTest
+  void test_constructors_inferFromArguments_redirecting() {
+    super.test_constructors_inferFromArguments_redirecting();
+  }
+
+  @override
+  @failingTest
+  void test_constructors_inferFromArguments_redirectingFactory() {
+    super.test_constructors_inferFromArguments_redirectingFactory();
+  }
+
+  @override
+  @failingTest
   void test_genericMethods_inferJSBuiltin() {
     super.test_genericMethods_inferJSBuiltin();
   }
 
   void test_infer_extractIndex_custom() {
     var unit = checkFile('''
 class A {
   String operator [](_) => null;
 }
 var a = new A();
@@ skipping 525 matching lines @@
     }
 
     UnlinkedUnit definingUnit = _getUnlinkedUnit(librarySource);
     LinkedLibraryBuilder linkedLibrary =
         prelink(definingUnit, getPart, getImport);
     linkedLibrary.dependencies.skip(1).forEach((LinkedDependency d) {
       _serializeLibrary(resolveRelativeUri(d.uri));
     });
   }
 }