Include method name in NoSuchMethodError.toString().

runtime/lib/error.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.
 // Errors are created and thrown by DartVM only.
 // Changes here should also be reflected in corelib/error.dart as well
 
 class AssertionErrorImplementation implements AssertionError {
   factory AssertionErrorImplementation._uninstantiable() {
     throw const UnsupportedOperationException(
         "AssertionError can only be allocated by the VM");
@@ skipping 80 matching lines @@
 }
 
 
 // TODO(regis): This class will change once mirrors are available.
 class NoSuchMethodErrorImplementation implements NoSuchMethodError {
   factory NoSuchMethodErrorImplementation._uninstantiable() {
     throw const UnsupportedOperationException(
         "NoSuchMethodError can only be allocated by the VM");
   }
 
-  String toString() => "No such method: url '$url' line $line "
+  String toString() => "No such method: '$functionName', url '$url' line $line "
       "pos $column\n$failedResolutionLine\n";
 
   static _throwNew(int call_pos, String functionName)
       native "NoSuchMethodError_throwNew";
 
   final String functionName;
   final String failedResolutionLine;
   final String url;
   final int line;
   final int column;
@@ skipping 13 matching lines @@
 
   String toString() {
     return "Cannot instantiate abstract class $className: "
            "url '$url' line $line";
   }
 
   final String className;
   final String url;
   final int line;
 }