dart2js cps: Keep interceptors in a separate field.

pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
index 1c7779bd4a08a5ea5c872efcda5bdd8ed20ce93c..8a5386462701497b5a4e46014c81613344fb1ac3 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
@@ -84,11 +84,14 @@ class IRTracer extends TracerUtil implements cps_ir.Visitor {
           return '${names.name(param)} ${param.type}';
         }
         if (entryPoint != null) {
-          String thisParam = entryPoint.thisParameter != null
-              ? formatParameter(entryPoint.thisParameter)
+          String thisParam = entryPoint.receiverParameter != null
+              ? formatParameter(entryPoint.receiverParameter)
               : 'no receiver';
+          String interceptorParam = entryPoint.interceptorParameter != null
+              ? formatParameter(entryPoint.interceptorParameter)
+              : 'no interceptor';
           String params = entryPoint.parameters.map(formatParameter).join(', ');
-          printStmt('x0', 'Entry ($thisParam) ($params)');
+          printStmt('x0', 'Entry ($interceptorParam) ($thisParam) ($params)');
         }
         String params = block.parameters.map(formatParameter).join(', ');
         printStmt('x0', 'Parameters ($params)');