Fix Function.end_token_pos() and implement MethodMirror.source getter

runtime/lib/mirrors_impl.dart

Index: runtime/lib/mirrors_impl.dart
diff --git a/runtime/lib/mirrors_impl.dart b/runtime/lib/mirrors_impl.dart
index 88a89cc5a2f220466eb79773bbcc1d36b80ca401..e2a49f725167e13f9f37e445669a843fbd32cf45 100644
--- a/runtime/lib/mirrors_impl.dart
+++ b/runtime/lib/mirrors_impl.dart
@@ -1009,6 +1009,14 @@ class _LocalMethodMirrorImpl extends _LocalDeclarationMirrorImpl
   final bool isRedirectingConstructor;
   final bool isFactoryConstructor;
 
+  String _source = null;
+  String get source {
+    if (_source == null) {
+      _source = _MethodMirror_source(_reflectee);

[siva, 2013/08/21 22:21:05]

assert(_source != null);

[Michael Lippautz (Google), 2013/08/21 23:19:20]

Done.

+    }
+    return _source;
+  }
+
   String toString() => "MethodMirror on '${_n(simpleName)}'";
 
   static dynamic _MethodMirror_owner(reflectee)
@@ -1019,6 +1027,9 @@ class _LocalMethodMirrorImpl extends _LocalDeclarationMirrorImpl
 
   List<ParameterMirror> _MethodMirror_parameters(reflectee)
       native "MethodMirror_parameters";
+
+  static String _MethodMirror_source(reflectee)
+      native "MethodMirror_source";
 }
 
 class _LocalVariableMirrorImpl extends _LocalDeclarationMirrorImpl