[Turbofan] Add CallConstructWithSpread JSOperator.

src/compiler/js-generic-lowering.cc

Index: src/compiler/js-generic-lowering.cc
diff --git a/src/compiler/js-generic-lowering.cc b/src/compiler/js-generic-lowering.cc
index 6738ddc165164fc2b193d4b12e15267accb1e5ef..dd65e2416dcec5b40dc7a71754c5740519a3022f 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -474,6 +474,12 @@ void JSGenericLowering::LowerJSCallConstruct(Node* node) {
   NodeProperties::ChangeOp(node, common()->Call(desc));
 }
 
+void JSGenericLowering::LowerJSCallConstructWithSpread(Node* node) {
+  CallConstructWithSpreadParameters const& p =
+      CallConstructWithSpreadParametersOf(node->op());
+  ReplaceWithRuntimeCall(node, Runtime::kNewWithSpread,
+                         static_cast<int>(p.arity()));
+}
 
 void JSGenericLowering::LowerJSCallFunction(Node* node) {
   CallFunctionParameters const& p = CallFunctionParametersOf(node->op());