Fix mirrors move errors.

sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart

 // Copyright (c) 2012, 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.
 
 library mirrors_dart2js;
 
 import 'dart:io';
 import 'dart:uri';
 
-import '../../../../compiler/compiler.dart' as diagnostics;
-import '../../../../compiler/implementation/elements/elements.dart';
-import '../../../../compiler/implementation/resolution/resolution.dart'
-    show ResolverTask, ResolverVisitor;
-import '../../../../compiler/implementation/apiimpl.dart' as api;
-import '../../../../compiler/implementation/scanner/scannerlib.dart';
-import '../../../../compiler/implementation/ssa/ssa.dart';
-import '../../../../compiler/implementation/dart2jslib.dart';
-import '../../../../compiler/implementation/filenames.dart';
-import '../../../../compiler/implementation/source_file.dart';
-import '../../../../compiler/implementation/tree/tree.dart';
-import '../../../../compiler/implementation/util/util.dart';
-import '../../../../compiler/implementation/util/uri_extras.dart';
-import '../../../../compiler/implementation/dart2js.dart';
-import '../../../../compiler/implementation/util/characters.dart';
+import '../../compiler.dart' as diagnostics;
+import '../elements/elements.dart';
+import '../resolution/resolution.dart' show ResolverTask, ResolverVisitor;
+import '../apiimpl.dart' as api;
+import '../scanner/scannerlib.dart';
+import '../ssa/ssa.dart';
+import '../dart2jslib.dart';
+import '../filenames.dart';
+import '../source_file.dart';
+import '../tree/tree.dart';
+import '../util/util.dart';
+import '../util/uri_extras.dart';
+import '../dart2js.dart';
+import '../util/characters.dart';
 
-// TODO(rnystrom): Use "package:" URL (#4968).
-import '../../mirrors.dart';
+import 'mirrors.dart';
 import 'util.dart';
 
 //------------------------------------------------------------------------------
 // Utility types and functions for the dart2js mirror system
 //------------------------------------------------------------------------------
 
 bool _isPrivate(String name) {
   return name.startsWith('_');
 }
 
@@ skipping 1488 matching lines @@
     if (node != null) {
       var span = mirrors.compiler.spanFromNode(node, script.uri);
       return new Dart2JsSourceLocation(script, span);
     } else {
       var span = mirrors.compiler.spanFromElement(_variable);
       return new Dart2JsSourceLocation(script, span);
     }
   }
 }