Update mirror tests for removed API.

tests/lib/mirrors/return_type_test.dart

Index: tests/lib/mirrors/return_type_test.dart
diff --git a/tests/lib/mirrors/return_type_test.dart b/tests/lib/mirrors/return_type_test.dart
index 6b90061cc8325bc9dde6a04dd3b1123e98693a6f..547e7610fb2e1fb97045d3482deacf643e24d75f 100644
--- a/tests/lib/mirrors/return_type_test.dart
+++ b/tests/lib/mirrors/return_type_test.dart
@@ -20,8 +20,16 @@ class B {
   // List<int> j() {}
 }
 
+methodsOf(ClassMirror cm) {
+  var result = new Map();
+  cm.declarations.forEach((k,v) {
+    if(v is MethodMirror && v.isRegularMethod) result[k] = v;
+  });
+  return result;
+}
+
 main() {
-  var methods = reflectClass(B).methods;
+  var methods = methodsOf(reflectClass(B));
 
   expect('{f: Method(s(f) in s(B)), '
          'g: Method(s(g) in s(B)), '
@@ -37,6 +45,4 @@ main() {
   expect('Class(s(int) in s(dart.core), top-level)', g.returnType);
   expect('Class(s(List) in s(dart.core), top-level)', h.returnType);
   expect('Class(s(B) in s(test.return_type_test), top-level)', i.returnType);
-
-  print(methods);
 }