[generators] Replace some runtime functions with Turbofan JS operators.

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 105298e392d329b2982a08990d3f59d69639b15f..f9d456b106994bae5582c0df88d3c20aa23e528e 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -679,6 +679,17 @@ void JSGenericLowering::LowerJSStoreMessage(Node* node) {
   NodeProperties::ChangeOp(node, machine()->Store(representation));
 }
 
+void JSGenericLowering::LowerJSGeneratorStore(Node* node) {
+  UNREACHABLE();  // Eliminated in typed lowering.
+}
+
+void JSGenericLowering::LowerJSGeneratorRestoreContinuation(Node* node) {
+  UNREACHABLE();  // Eliminated in typed lowering.
+}
+
+void JSGenericLowering::LowerJSGeneratorRestoreRegister(Node* node) {
+  UNREACHABLE();  // Eliminated in typed lowering.
+}
 
 void JSGenericLowering::LowerJSStackCheck(Node* node) {
   Node* effect = NodeProperties::GetEffectInput(node);