Remove Registry arguments from Enqueuer.

pkg/compiler/lib/src/common/codegen.dart

Index: pkg/compiler/lib/src/common/codegen.dart
diff --git a/pkg/compiler/lib/src/common/codegen.dart b/pkg/compiler/lib/src/common/codegen.dart
index 3a24bb695582c5eacb8ff57bf40372054b9b14c8..e220aabde260f63c44210af35cbfe1f25eaf553a 100644
--- a/pkg/compiler/lib/src/common/codegen.dart
+++ b/pkg/compiler/lib/src/common/codegen.dart
@@ -75,11 +75,11 @@ class CodegenRegistry extends Registry {
   }
 
   void registerInstantiatedClass(ClassElement element) {
-    world.registerInstantiatedType(element.rawType, this);
+    backend.registerInstantiatedType(element.rawType, world, this);
   }
 
   void registerInstantiatedType(InterfaceType type) {
-    world.registerInstantiatedType(type, this);
+    backend.registerInstantiatedType(type, world, this);
   }
 
   void registerStaticUse(Element element) {
@@ -169,7 +169,7 @@ class CodegenRegistry extends Registry {
   }
 
   void registerInstantiation(InterfaceType type) {
-    world.registerInstantiatedType(type, this);
+    backend.registerInstantiatedType(type, world, this);
   }
 
   void registerAsyncMarker(FunctionElement element) {