Adding ElementsAccessor::Unshift

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 8d572712d9cc52923f57ba3d26ba9c2933a9da33..5f2cf5c986c196e48b5c8b38c4d05258cdd5f940 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -14274,9 +14274,17 @@ size_t JSTypedArray::element_size() {
 void FixedArray::SetValue(uint32_t index, Object* value) { set(index, value); }
 
 
+void FixedArray::SetValue(uint32_t index, Object* value,
+                          WriteBarrierMode mode) {
+  set(index, value, mode);
+}
+
+
 void FixedDoubleArray::SetValue(uint32_t index, Object* value) {
   set(index, value->Number());
 }
+
+
 void GlobalObject::InvalidatePropertyCell(Handle<GlobalObject> global,
                                           Handle<Name> name) {
   DCHECK(!global->HasFastProperties());