[stubs] Introduce ToNameStub to implement %_ToName.

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 15ce908a1ce68d16870fb3ce040cfb2cd9c163bb..f40e71c6d0831623d4a1dadfd861cf317a70edcd 100644
--- a/src/compiler/js-generic-lowering.cc
+++ b/src/compiler/js-generic-lowering.cc
@@ -267,7 +267,9 @@ void JSGenericLowering::LowerJSToString(Node* node) {
 
 
 void JSGenericLowering::LowerJSToName(Node* node) {
-  ReplaceWithRuntimeCall(node, Runtime::kToName);
+  CallDescriptor::Flags flags = AdjustFrameStatesForCall(node);
+  Callable callable = CodeFactory::ToName(isolate());
+  ReplaceWithStubCall(node, callable, flags);
 }