Add top level type inference logic for integer literals.

pkg/front_end/lib/src/fasta/parser/listener.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.
 
 library fasta.parser.listener;
 
 import '../fasta_codes.dart' show FastaMessage;
 
 import '../scanner/token.dart' show BeginGroupToken, SymbolToken, Token;
 
@@ skipping 397 matching lines @@
   void beginInitializedIdentifier(Token token) {}
 
   void endInitializedIdentifier(Token nameToken) {
     logEvent("InitializedIdentifier");
   }
 
   void beginFieldInitializer(Token token) {}
 
   /// Handle the end of a field initializer.  Substructures:
   /// - Initializer expression
-  void endFieldInitializer(Token assignment) {
+  void endFieldInitializer(Token assignment, Token token) {
     logEvent("FieldInitializer");
   }
 
   /// Handle the lack of a field initializer.
   void handleNoFieldInitializer(Token token) {
     logEvent("NoFieldInitializer");
   }
 
   void beginVariableInitializer(Token token) {}
 
@@ skipping 639 matching lines @@
 
   final FastaMessage message;
 
   ParserError(this.beginOffset, this.endOffset, this.message);
 
   ParserError.fromTokens(Token begin, Token end, FastaMessage message)
       : this(begin.charOffset, end.charOffset + end.charCount, message);
 
   String toString() => "@${beginOffset}: ${message.message}\n${message.tip}";
 }