Implement DeclarationMirror.location for all but ParameterMirrors.

tests/lib/mirrors/class_mirror_location_other.dart

Index: tests/lib/mirrors/class_mirror_location_other.dart
diff --git a/tests/language/enum_duplicate_lib.dart b/tests/lib/mirrors/class_mirror_location_other.dart
similarity index 63%
copy from tests/language/enum_duplicate_lib.dart
copy to tests/lib/mirrors/class_mirror_location_other.dart
index b9c84f5109af8178afedae4313ab9056c08b263b..eb94d21d6ce68ee04f4dfd525708b60708426d63 100644
--- a/tests/language/enum_duplicate_lib.dart
+++ b/tests/lib/mirrors/class_mirror_location_other.dart
@@ -2,13 +2,10 @@
 // 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.
 
-library enum_duplicate_lib;
+part of test.class_location;
 
-enum Enum1 {
-  A,
-  B,
-}
+class ClassInOtherFile {}
 
-class Enum2 {
-  static Iterable get values => ['Enum2.A', 'Enum2.B'];
-}
+  class SpaceIndentedInOtherFile {}
+
+	class TabIndentedInOtherFile {}