Revert "Parts must start with 'part of'" and "Attempt to fix VM build"

dart/tests/language/library_same_name_used_test.dart

Index: dart/tests/language/library_same_name_used_test.dart
diff --git a/dart/tests/language/library_same_name_used_test.dart b/dart/tests/language/library_same_name_used_test.dart
index 1bea02dea1c068e83eedd74ffe046bccb859b19a..158ffc6c56bfa2c8b64674d21ec409582d528c62 100644
--- a/dart/tests/language/library_same_name_used_test.dart
+++ b/dart/tests/language/library_same_name_used_test.dart
@@ -5,8 +5,8 @@
 // 'X' is defined as an interface in lib1 and a class implementing that
 // interface in lib2.  Use of #import prefixes should allow this.
 
-library main;
-import "library_same_name_used_lib1.dart";
+#library('main');
+#import("library_same_name_used_lib1.dart");
 
 main() {
   var x = makeX();