Implement MethodMirror.location in the VM.

tests/lib/mirrors/method_mirror_location_other.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // 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.
 
-// This file is marked executable so source control will preserve the type of
-// line ending.
+part of test.method_location;
 
-library line_endings.lf;
+class ClassInOtherFile {
 
-oneLineLF(x) => x;
-multiLineLF(y) {
-  return y + 1;
+  ClassInOtherFile();
+
+  method() {}
 }
-a
-(){
-}
+
+topLevelInOtherFile() {}
+
+  spaceIdentedInOtherFile() {}
+
+        tabIdentedInOtherFile() {}