fix for 1.12.0-dev SDK and 0.25.1 analyzer breaking changes

lib/src/codegen/reify_coercions.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.
 
 library dev_compiler.src.codegen.reify_coercions;
 
 import 'package:analyzer/analyzer.dart' as analyzer;
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:logging/logging.dart' as logger;
@@ skipping 412 matching lines @@
     // type variables with the fresh type variables
     element.returnType = type.returnType.substitute2(tTypes, ftvs);
     // Set the type parameter elements
     element.typeParameters = tElements;
     // Set the parent element to the current compilation unit
     element.enclosingElement = _currentUnit;
 
     // This is the type corresponding to the typedef.  Note that
     // almost all methods on this type delegate to the element, so it
     // cannot be safely be used for anything until the element is fully resolved
-    FunctionTypeImpl substType = new FunctionTypeImpl.con2(element);
+    FunctionTypeImpl substType = new FunctionTypeImpl.forTypedef(element);
     element.type = substType;
     // Link the type and the element into the identifier for the typedef
     t.staticType = substType;
     t.staticElement = element;
 
     // Make the formal parameters for the typedef, using the original type
     // with the fresh type variables substituted in.
     List<FormalParameter> fps =
         _formalParameterListForFunctionType(type.substitute2(tTypes, ftvs));
     // Get the static elements out of the parameters, and use them to
@@ skipping 54 matching lines @@
     var t = _mkNewTypeName(dType, id, args);
     return t;
   }
 
   TypeName _mkNewTypeName(DartType type, Identifier id, List<TypeName> args) {
     var t = AstBuilder.typeName(id, args);
     t.type = type;
     return t;
   }
 }