dart2js cps: Status updates and minor fixes for host checked mode.

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

Index: pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
index b8af30dca658b6bd4a02459500ab2c779700957f..86f968d68215c4c56d7a56dd22ed9dde518c3269 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
@@ -2065,8 +2065,7 @@ abstract class IrBuilderVisitor extends ast.Visitor<ir.Primitive>
   }
 
   @override
-  ir.Primitive bulkHandleError(ast.Send node, ErroneousElement error, _) {
-    assert(compiler.compilationFailed);
+  ir.Primitive bulkHandleError(ast.Node node, ErroneousElement error, _) {
     return irBuilder.buildNullConstant();
   }