Remove Compiler/JavaScriptBackend from metadata_collector

tests/compiler/dart2js/js_parser_statements_test.dart

Index: tests/compiler/dart2js/js_parser_statements_test.dart
diff --git a/tests/compiler/dart2js/js_parser_statements_test.dart b/tests/compiler/dart2js/js_parser_statements_test.dart
index 9432ffb599e0ccb2cc52b2c7c82f5544dc3661a5..72d53e1789ce613838473fe11eb562a35948a7ac 100644
--- a/tests/compiler/dart2js/js_parser_statements_test.dart
+++ b/tests/compiler/dart2js/js_parser_statements_test.dart
@@ -12,8 +12,8 @@ import 'package:compiler/src/js/js.dart' show js;
 Future testStatement(String statement, arguments, String expect) {
   jsAst.Node node = js.statement(statement, arguments);
   return MockCompiler.create((MockCompiler compiler) {
-    String jsText =
-        jsAst.prettyPrint(node, compiler, allowVariableMinification: false);
+    String jsText = jsAst.prettyPrint(node, compiler.options,
+        allowVariableMinification: false);
 
     Expect.stringEquals(expect.trim(), jsText.trim());
   });