Call JS functions via native context instead of js builtins object.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 8438a4aadcb7dca1fd82c24442b804d2c570424b..f81576b2c6df9832b5ccd9a2f536e0d83c15ffcf 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -1099,7 +1099,7 @@ std::ostream& HCallNewArray::PrintDataTo(std::ostream& os) const {  // NOLINT
 
 
 std::ostream& HCallRuntime::PrintDataTo(std::ostream& os) const {  // NOLINT
-  os << name()->ToCString().get() << " ";
+  os << function()->name << " ";
   if (save_doubles() == kSaveFPRegs) os << "[save doubles] ";
   return os << "#" << argument_count();
 }