Add mirrors tests

test/codegen/lib/mirrors/method_mirror_location_other.dart

Index: test/codegen/lib/mirrors/method_mirror_location_other.dart
diff --git a/test/codegen/language/regress_12561_test.dart b/test/codegen/lib/mirrors/method_mirror_location_other.dart
similarity index 55%
copy from test/codegen/language/regress_12561_test.dart
copy to test/codegen/lib/mirrors/method_mirror_location_other.dart
index 21acb0e51951407b03c3d35581944ac4029cb09f..48ebdb53dff0e4454860c091c791a9416fd1fd0b 100644
--- a/test/codegen/language/regress_12561_test.dart
+++ b/test/codegen/lib/mirrors/method_mirror_location_other.dart
@@ -2,14 +2,17 @@
 // 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.
 
-import "package:expect/expect.dart";
+part of test.method_location;
 
-class C {
-  noSuchMethod(int x, int y) => x + y;
-}
+class ClassInOtherFile {
+
+  ClassInOtherFile();
 
-main() {
-  Expect.throws(() => new C().foo, (e) => e is Error);
+  method() {}
 }
 
+topLevelInOtherFile() {}
+
+  spaceIdentedInOtherFile() {}
 
+	tabIdentedInOtherFile() {}