Remove Compiler/JavaScriptBackend from metadata_collector

pkg/compiler/lib/src/js_backend/constant_emitter.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.
 
 import '../common.dart';
 import '../compiler.dart' show Compiler;
 import '../constants/values.dart';
 import '../elements/resolution_types.dart';
 import '../elements/elements.dart';
 import '../io/code_output.dart';
@@ skipping 328 matching lines @@
       reporter.internalError(
           NO_LOCATION_SPANNABLE,
           "Unexpected type variable '${variable.getStringAsDeclared(null)}'"
           " in constant type '${type.getStringAsDeclared(null)}'");
       return null;
     }
 
     List<jsAst.Expression> arguments = <jsAst.Expression>[];
     RuntimeTypesEncoder rtiEncoder = backend.rtiEncoder;
     for (ResolutionDartType argument in type.typeArguments) {
-      arguments.add(rtiEncoder.getTypeRepresentation(argument, unexpected));
+      arguments.add(rtiEncoder.getTypeRepresentation(
+          backend.emitter.emitter, argument, unexpected));
     }
     return new jsAst.ArrayInitializer(arguments);
   }
 
   @override
   jsAst.Expression visitDeferred(DeferredConstantValue constant, [_]) {
     return constantReferenceGenerator(constant.referenced);
   }
 }