Fix for issue 1480: analyze a method even if it does not have a body, and do not try to evaluate ...

dart/frog/method_data.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.
 
 
 class MethodCallData {
   MethodData data;
 
   MethodMember method;
 
@@ skipping 29 matching lines @@
   List<MethodCallData> _calls;
 
   MethodData(this.baseMethod, [this.context]): _calls = [] {
     body = baseMethod.definition.body;
     if (baseMethod.isConstructor) {
       needsTypeParams = true;
     }
   }
 
   void analyze() {
-    // TODO(jimhug): Is there really no analysis to do for a missing body?
-    if (body === null) return;
     var ma = new MethodAnalyzer(baseMethod, body);
     ma.analyze(context);
     // TODO(jimhug): Add support for specializing on type parameters.
     /*
     if (ma.hasTypeParams) {
       needsTypeParams = true;
     }
     */
   }
 
@@ skipping 80 matching lines @@
     if (baseMethod.name != '') {
       lambdaGen._popBlock(baseMethod.definition);
     }
 
     final writer = new CodeWriter();
     lambdaGen.writeDefinition(writer, node);
     return new Value(baseMethod.functionType, writer.text,
       baseMethod.definition.span);
   }
 }