Use IsPropertyName instead of IsInternalizedString in VisitObjectLiteral.

src/full-codegen/mips64/full-codegen-mips64.cc

Index: src/full-codegen/mips64/full-codegen-mips64.cc
diff --git a/src/full-codegen/mips64/full-codegen-mips64.cc b/src/full-codegen/mips64/full-codegen-mips64.cc
index 081c7d2d34afbc346e9f6b2ba59e6e10cbbdb34b..103ea02ed5090acb1387d0530747b226918d2ba0 100644
--- a/src/full-codegen/mips64/full-codegen-mips64.cc
+++ b/src/full-codegen/mips64/full-codegen-mips64.cc
@@ -1424,7 +1424,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
       case ObjectLiteral::Property::COMPUTED:
         // It is safe to use [[Put]] here because the boilerplate already
         // contains computed properties with an uninitialized value.
-        if (key->value()->IsInternalizedString()) {
+        if (key->IsPropertyName()) {
           if (property->emit_store()) {
             VisitForAccumulatorValue(value);
             __ mov(StoreDescriptor::ValueRegister(), result_register());