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

src/compiler/js-typed-lowering.h

Index: src/compiler/js-typed-lowering.h
diff --git a/src/compiler/js-typed-lowering.h b/src/compiler/js-typed-lowering.h
index 8733e6c7818cf7bcd657d5f7e0c3f3bedbe2ae86..f4298a04ba675f8e10f31e6b42d57f61dc71f779 100644
--- a/src/compiler/js-typed-lowering.h
+++ b/src/compiler/js-typed-lowering.h
@@ -76,6 +76,9 @@ class JSTypedLowering final : public AdvancedReducer {
   Reduction ReduceJSForInDone(Node* node);
   Reduction ReduceJSForInNext(Node* node);
   Reduction ReduceJSForInStep(Node* node);
+  Reduction ReduceJSGeneratorStore(Node* node);
+  Reduction ReduceJSGeneratorRestoreContinuation(Node* node);
+  Reduction ReduceJSGeneratorRestoreRegister(Node* node);
   Reduction ReduceSelect(Node* node);
   Reduction ReduceNumberBinop(Node* node, const Operator* numberOp);
   Reduction ReduceInt32Binop(Node* node, const Operator* intOp);