dart2js cps_ir: Use interceptors for is-checks.

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 a969bdbece7a3e910938cf7400c4c73f8d7cd0dd..7ef6736ad55fb9f2a6564f390d6270df0f8b35fc 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_tracer.dart
@@ -349,6 +349,14 @@ class IRTracer extends TracerUtil implements cps_ir.Visitor {
     return "TypeTest ($value ${node.dartType} ($args))";
   }
 
+  visitTypeTestRaw(cps_ir.TypeTestRaw node) {
+    String value = formatReference(node.value);
+    String interceptor = node.interceptor == null
+        ? ''
+        : ' ${formatReference(node.interceptor)}';
+    return "TypeTestRaw ($value ${node.dartType}$interceptor)";

[sra1, 2015/10/06 06:47:58]

How is this tested?

+  }
+
   visitApplyBuiltinOperator(cps_ir.ApplyBuiltinOperator node) {
     String operator = node.operator.toString();
     String args = node.arguments.map(formatReference).join(', ');
@@ -643,6 +651,10 @@ class BlockCollector implements cps_ir.Visitor {
     unexpectedNode(node);
   }
 
+  visitTypeTestRaw(cps_ir.TypeTestRaw node) {
+    unexpectedNode(node);
+  }
+
   visitApplyBuiltinOperator(cps_ir.ApplyBuiltinOperator node) {
     unexpectedNode(node);
   }