dart2js cps: 'is' checks on types with type arguments.

pkg/compiler/lib/src/js_backend/codegen/glue.dart

Index: pkg/compiler/lib/src/js_backend/codegen/glue.dart
diff --git a/pkg/compiler/lib/src/js_backend/codegen/glue.dart b/pkg/compiler/lib/src/js_backend/codegen/glue.dart
index c44da0ea6afe199db3e24700ae45a9110af4fe4b..cb87354e609e6cc853493ff01f70df3b8b687bbc 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/glue.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/glue.dart
@@ -171,6 +171,10 @@ class Glue {
     return _backend.getSetRuntimeTypeInfo();
   }
 
+  FunctionElement getCheckSubtype() {
+    return _backend.getCheckSubtype();
+  }
+
   js.Expression getRuntimeTypeName(ClassElement cls) {
     return js.string(_namer.runtimeTypeName(cls));
   }
@@ -208,7 +212,15 @@ class Glue {
     return _backend.namer.operatorIsType(type);
   }
 
+  String getTypeSubstitutionTag(ClassElement element) {
+    return _backend.namer.substitutionName(element);
+  }
+
   bool operatorEqHandlesNullArgument(FunctionElement element) {
     return _backend.operatorEqHandlesNullArgument(element);
   }
+
+  bool hasStrictSubtype(ClassElement element) {
+    return _compiler.world.hasAnyStrictSubtype(element);
+  }
 }