Adds support for remaining generic method syntax constructs.

pkg/compiler/lib/src/tree/nodes.dart

 // Copyright (c) 2012, 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:collection' show IterableMixin;
 
 import '../common.dart';
 import '../tokens/precedence_constants.dart' as Precedence show FUNCTION_INFO;
 import '../tokens/token.dart' show BeginGroupToken, Token;
 import '../tokens/token_constants.dart' as Tokens
@@ skipping 1719 matching lines @@
   Token getBeginToken() => typeName.getBeginToken();
 
   Token getEndToken() {
     if (typeArguments != null) return typeArguments.getEndToken();
     return typeName.getEndToken();
   }
 }
 
 class TypeVariable extends Node {
   final Identifier name;
+  final Token extendsOrSuper;
   final TypeAnnotation bound;
-  TypeVariable(Identifier this.name, TypeAnnotation this.bound);
+  TypeVariable(this.name, this.extendsOrSuper, this.bound);
 
   accept(Visitor visitor) => visitor.visitTypeVariable(this);
 
   accept1(Visitor1 visitor, arg) => visitor.visitTypeVariable(this, arg);
 
   visitChildren(Visitor visitor) {
     name.accept(visitor);
     if (bound != null) {
       bound.accept(visitor);
     }
@@ skipping 1362 matching lines @@
 
   // VariableDefinitions.
   get metadata => null;
   get type => null;
 
   // Typedef.
   get typeParameters => null;
   get formals => null;
   get typedefKeyword => null;
 }