Support intercepted getters, setters and index operations.

tests/compiler/dart2js/js_backend_cps_ir_supercall_test.dart

Index: tests/compiler/dart2js/js_backend_cps_ir_supercall_test.dart
diff --git a/tests/compiler/dart2js/js_backend_cps_ir_supercall_test.dart b/tests/compiler/dart2js/js_backend_cps_ir_supercall_test.dart
index 048beec21ff68532009888c6fd1061090ed5a0f4..b1b578d4aecb471dc3e7e2cb59376064de422f46 100644
--- a/tests/compiler/dart2js/js_backend_cps_ir_supercall_test.dart
+++ b/tests/compiler/dart2js/js_backend_cps_ir_supercall_test.dart
@@ -26,7 +26,7 @@ r"""
 function(x) {
   var v0, v1;
   v0 = 10;
-  v1 = J.getInterceptor(x).$add(x, v0);
+  v1 = J.getInterceptor$ns(x).$add(x, v0);
   return V.Base.prototype.m$1.call(this, v1);
 }"""),
 
@@ -48,7 +48,7 @@ r"""
 function(x) {
   var v0, v1, v2;
   v0 = 1;
-  v1 = J.getInterceptor(x).$add(x, v0);
+  v1 = J.getInterceptor$ns(x).$add(x, v0);
   v2 = this;
   return V.Base.prototype.$add.call(null, v2, v1);
 }"""),
@@ -67,7 +67,7 @@ r"""
 function(x) {
   var v0;
   v0 = this.field;
-  return J.getInterceptor(x).$add(x, v0);
+  return J.getInterceptor$ns(x).$add(x, v0);
 }"""),