Cleanup after the interceptor refactoring work, and add a new SSA instruction for an interceptor, s…

sdk/lib/_internal/compiler/implementation/resolution/members.dart

Index: sdk/lib/_internal/compiler/implementation/resolution/members.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/resolution/members.dart	(revision 15190)
+++ sdk/lib/_internal/compiler/implementation/resolution/members.dart	(working copy)
@@ -1507,6 +1507,8 @@
 
     scope = oldScope;
     enclosingElement = previousEnclosingElement;
+
+    world.registerInstantiatedClass(compiler.functionClass);
   }
 
   visitIf(If node) {
@@ -1882,12 +1884,6 @@
         world.registerStaticUse(target.declaration);
       }
     }
-    if (target == null) {
-      // If we haven't found an element for this send, it might be a
-      // dynamic send on a primitive value. Register the selector with
-      // the world to add an interceptor, if necessary.
-      world.registerUsedSelector(selector);
-    }
   }
 
   visitLiteralInt(LiteralInt node) {