Update imports to use package:compiler and package:try.

dart/tests/compiler/dart2js/mirror_helper_rename_test.dart

Index: dart/tests/compiler/dart2js/mirror_helper_rename_test.dart
diff --git a/dart/tests/compiler/dart2js/mirror_helper_rename_test.dart b/dart/tests/compiler/dart2js/mirror_helper_rename_test.dart
index 10a1e22f7699430766225c485c3b506b8ffd1463..13cfc987a0098e342ae979263c40ca2228c8e07e 100644
--- a/dart/tests/compiler/dart2js/mirror_helper_rename_test.dart
+++ b/dart/tests/compiler/dart2js/mirror_helper_rename_test.dart
@@ -6,16 +6,12 @@ import "package:expect/expect.dart";
 import 'dart:async';
 import "package:async_helper/async_helper.dart";
 import 'memory_compiler.dart' show compilerFor;
-import '../../../sdk/lib/_internal/compiler/implementation/apiimpl.dart' show
+import 'package:compiler/implementation/apiimpl.dart' show
     Compiler;
-import
-    '../../../sdk/lib/_internal/compiler/implementation/tree/tree.dart'
-show
+import 'package:compiler/implementation/tree/tree.dart' show
     Node;
-import
-    '../../../sdk/lib/_internal/compiler/implementation/dart_backend/dart_backend.dart';
-import
-    '../../../sdk/lib/_internal/compiler/implementation/mirror_renamer/mirror_renamer.dart';
+import 'package:compiler/implementation/dart_backend/dart_backend.dart';
+import 'package:compiler/implementation/mirror_renamer/mirror_renamer.dart';
 
 main() {
   testWithMirrorHelperLibrary(minify: true);