Implement [Generator].prototype.return.

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index a95e6d818656ce0b849ba5f619afd385c885c31f..0dfcb00017b8ab6ace649d8e59040c6767e60d5e 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -2587,6 +2587,7 @@ void AstGraphBuilder::VisitCallRuntime(CallRuntime* expr) {
 
   // TODO(mstarzinger): This bailout is a gigantic hack, the owner is ashamed.
   if (function->function_id == Runtime::kInlineGeneratorNext ||
+      function->function_id == Runtime::kInlineGeneratorReturn ||
       function->function_id == Runtime::kInlineGeneratorThrow) {
     ast_context()->ProduceValue(jsgraph()->TheHoleConstant());
     return SetStackOverflow();