Implement type variables on local function declarations and expressions.

pkg/front_end/lib/src/incremental/unlinked_unit.dart

 // Copyright (c) 2017, 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:typed_data';
 
 import 'package:front_end/src/base/api_signature.dart';
 import 'package:front_end/src/fasta/parser.dart'
     show Listener, Parser, optional;
 import 'package:front_end/src/fasta/parser/top_level_parser.dart';
@@ skipping 92 matching lines @@
 }
 
 /// The [Parser] that skips function bodies and remembers their token ranges.
 class _BodySkippingParser extends Parser {
   bool hasMixin = false;
   final List<_BodyRange> bodyRanges = [];
 
   _BodySkippingParser() : super(new Listener());
 
   @override
-  Token parseFunctionBody(Token token, bool isExpression, bool allowAbstract) {
+  Token parseFunctionBody(
+      Token token, bool ofFunctionExpression, bool allowAbstract) {
     if (identical('{', token.lexeme)) {
       Token close = skipBlock(token);
       bodyRanges.add(new _BodyRange(token.charOffset, close.charOffset));
-      return isExpression ? close.next : close;
+      return ofFunctionExpression ? close.next : close;
     }
-    return super.parseFunctionBody(token, isExpression, allowAbstract);
+    return super.parseFunctionBody(token, ofFunctionExpression, allowAbstract);
   }
 
   Token parseMixinApplicationRest(Token token) {
     hasMixin = true;
     return super.parseMixinApplicationRest(token);
   }
 }