dart2js cps: Fix codegen for foreign statements.

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 56d5896704cb1e3f6a3ebbd65b2f03489e0f879c..1c5adcfb262a5b7b67d9f2f12ebfd145e0331a93 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
@@ -371,8 +371,8 @@ class IRTracer extends TracerUtil implements cps_ir.Visitor {
     String arguments = node.arguments.map(formatReference).join(', ');
     String continuation = node.continuation == null ? ''
         : ' ${formatReference(node.continuation)}';
-    printStmt(id, "ForeignCode ${node.type} ${node.codeTemplate} $arguments"
-        "$continuation");
+    printStmt(id, "ForeignCode ${node.type} ${node.codeTemplate.source} "
+        "$arguments $continuation");
   }
 }