Add a MirrorReference reflectee to MethodMirrors. Name getter now refers to

runtime/lib/mirrors_impl.dart

Index: runtime/lib/mirrors_impl.dart
===================================================================
--- runtime/lib/mirrors_impl.dart	(revision 24851)
+++ runtime/lib/mirrors_impl.dart	(working copy)
@@ -829,7 +829,7 @@
 
 class _LocalMethodMirrorImpl extends _LocalMirrorImpl
     implements MethodMirror {
-  _LocalMethodMirrorImpl(String simpleName,
+  _LocalMethodMirrorImpl(this._reflectee,
                          this._owner,
                          this.parameters,
                          this._returnType,
@@ -841,11 +841,18 @@
                          this.isConstConstructor,
                          this.isGenerativeConstructor,
                          this.isRedirectingConstructor,
-                         this.isFactoryConstructor)
-      : this.simpleName = _s(simpleName);
+                         this.isFactoryConstructor);
 
-  final Symbol simpleName;
+  final _MirrorReference _reflectee;
 
+  Symbol _simpleName = null;
+  Symbol get simpleName {
+    if (_simpleName == null) {
+      _simpleName = _s(_MethodMirror_name(_reflectee));
+    }
+    return _simpleName;
+  }
+
   Symbol _qualifiedName = null;
   Symbol get qualifiedName {
     if (_qualifiedName == null) {
@@ -932,6 +939,9 @@
   }
 
   String toString() => "MethodMirror on '${_n(simpleName)}'";
+
+  static String _MethodMirror_name(reflectee)
+      native "MethodMirror_name";
 }
 
 class _LocalVariableMirrorImpl extends _LocalMirrorImpl