Add top level type inference logic for integer literals.

pkg/compiler/lib/src/parser/node_listener.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 dart2js.parser.node_listener;
 
 import '../common.dart';
 import '../elements/elements.dart' show CompilationUnitElement;
 import 'package:front_end/src/fasta/parser/parser.dart'
     show FormalParameterType;
@@ skipping 513 matching lines @@
   void endVariableInitializer(Token assignmentOperator) {
     Expression initializer = popNode();
     NodeList arguments =
         initializer == null ? null : new NodeList.singleton(initializer);
     Expression name = popNode();
     Operator op = new Operator(assignmentOperator);
     pushNode(new SendSet(null, name, op, arguments));
   }
 
   @override
-  void endFieldInitializer(Token assignmentOperator) {
+  void endFieldInitializer(Token assignmentOperator, Token token) {
     endVariableInitializer(assignmentOperator);
   }
 
   @override
   void endIfStatement(Token ifToken, Token elseToken) {
     Statement elsePart = (elseToken == null) ? null : popNode();
     Statement thenPart = popNode();
     ParenthesizedExpression condition = popNode();
     pushNode(new If(condition, thenPart, elsePart, ifToken, elseToken));
   }
@@ skipping 490 matching lines @@
     }
     lastErrorWasNativeFunctionBody = false;
   }
 
   void internalError({Token token, Node node}) {
     // TODO(ahe): This should call reporter.internalError.
     Spannable spannable = (token == null) ? node : token;
     throw new SpannableAssertionFailure(spannable, 'Internal error in parser.');
   }
 }