Updated tests/compiler/* to use new library syntax.

tests/compiler/dart2js/field_codegen_test.dart

Index: tests/compiler/dart2js/field_codegen_test.dart
===================================================================
--- tests/compiler/dart2js/field_codegen_test.dart	(revision 14690)
+++ tests/compiler/dart2js/field_codegen_test.dart	(working copy)
@@ -3,8 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 // Test that parameters keep their names in the output.
 
-#import("compiler_helper.dart");
-#import("parser_helper.dart");
+import 'compiler_helper.dart';
+import 'parser_helper.dart';
 
 const String TEST_NULL0 = r"""
 class A { static var x; }