Access BackendUsage through ClosedWorld

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

Index: pkg/compiler/lib/src/kernel/kernel_strategy.dart
diff --git a/pkg/compiler/lib/src/kernel/kernel_strategy.dart b/pkg/compiler/lib/src/kernel/kernel_strategy.dart
index 1f78ed0611def275cacbbec5ed0364ee933d979f..c32b756e300b818c3bca2c733ec8d5eef9b81816 100644
--- a/pkg/compiler/lib/src/kernel/kernel_strategy.dart
+++ b/pkg/compiler/lib/src/kernel/kernel_strategy.dart
@@ -113,9 +113,15 @@ class KernelFrontEndStrategy implements FrontEndStrategy {
       NativeBasicData nativeBasicData,
       NativeDataBuilder nativeDataBuilder,
       InterceptorDataBuilder interceptorDataBuilder,
+      BackendUsageBuilder backendUsageBuilder,
       SelectorConstraintsStrategy selectorConstraintsStrategy) {
-    return new KernelResolutionWorldBuilder(elementMap, nativeBasicData,
-        nativeDataBuilder, interceptorDataBuilder, selectorConstraintsStrategy);
+    return new KernelResolutionWorldBuilder(
+        elementMap,
+        nativeBasicData,
+        nativeDataBuilder,
+        interceptorDataBuilder,
+        backendUsageBuilder,
+        selectorConstraintsStrategy);
   }
 
   WorkItemBuilder createResolutionWorkItemBuilder(