new classes: implement new.target passing to superclass constructor.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 59089e03d618efc5a0914e02e1ccb9aa06c4c58f..2ddfbd053255f0049b753b37f59af0281c358252 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -810,6 +810,12 @@ Handle<Code> Pipeline::GenerateCode() {
     return Handle<Code>::null();
   }
 
+  // TODO(dslomov): support turbo optimization of subclass constructors.
+  if (IsSubclassConstructor(shared->kind())) {
+    shared->DisableOptimization(kSuperReference);
+    return Handle<Code>::null();
+  }
+
   ZonePool zone_pool;
   SmartPointer<PipelineStatistics> pipeline_statistics;