Access BackendUsage through ClosedWorld

pkg/compiler/lib/src/kernel/element_map_impl.dart

Index: pkg/compiler/lib/src/kernel/element_map_impl.dart
diff --git a/pkg/compiler/lib/src/kernel/element_map_impl.dart b/pkg/compiler/lib/src/kernel/element_map_impl.dart
index ad516675999c968a8cc0c279e90c951da1569749..9a1d88a13b0c138e74c4420a13be287eea62c0da 100644
--- a/pkg/compiler/lib/src/kernel/element_map_impl.dart
+++ b/pkg/compiler/lib/src/kernel/element_map_impl.dart
@@ -22,6 +22,7 @@ import '../elements/names.dart';
 import '../elements/types.dart';
 import '../environment.dart';
 import '../frontend_strategy.dart';
+import '../js_backend/backend_usage.dart';
 import '../js_backend/constant_system_javascript.dart';
 import '../js_backend/interceptor_data.dart';
 import '../js_backend/native_data.dart';
@@ -1250,6 +1251,7 @@ class KernelResolutionWorldBuilder extends KernelResolutionWorldBuilderBase {
       NativeBasicData nativeBasicData,
       NativeDataBuilder nativeDataBuilder,
       InterceptorDataBuilder interceptorDataBuilder,
+      BackendUsageBuilder backendUsageBuilder,
       SelectorConstraintsStrategy selectorConstraintsStrategy)
       : super(
             elementMap.elementEnvironment,
@@ -1257,6 +1259,7 @@ class KernelResolutionWorldBuilder extends KernelResolutionWorldBuilderBase {
             nativeBasicData,
             nativeDataBuilder,
             interceptorDataBuilder,
+            backendUsageBuilder,
             selectorConstraintsStrategy);
 
   @override