Ensure slow properties for simple {__proto__:null} literals.

test/cctest/interpreter/bytecode_expectations/ForIn.golden

Index: test/cctest/interpreter/bytecode_expectations/ForIn.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/ForIn.golden b/test/cctest/interpreter/bytecode_expectations/ForIn.golden
index 4c2984dbc2cf21bf2ce96497a73552fcf562ddc6..e9bb4ee481d9eb9f6449c09c248f6a05ece3445d 100644
--- a/test/cctest/interpreter/bytecode_expectations/ForIn.golden
+++ b/test/cctest/interpreter/bytecode_expectations/ForIn.golden
@@ -107,7 +107,7 @@ bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(LdaZero),
                 B(Star), R(0),
-  /*   59 S> */ B(CreateArrayLiteral), U8(0), U8(2), U8(9),
+  /*   59 S> */ B(CreateArrayLiteral), U8(0), U8(2), U8(17),
                 B(JumpIfUndefined), U8(46),
                 B(JumpIfNull), U8(44),
                 B(ToObject), R(3),
@@ -152,7 +152,7 @@ bytecodes: [
   /*   30 E> */ B(StackCheck),
   /*   42 S> */ B(CreateObjectLiteral), U8(0), U8(2), U8(1), R(1),
                 B(Mov), R(1), R(0),
-  /*   77 S> */ B(CreateArrayLiteral), U8(1), U8(3), U8(9),
+  /*   77 S> */ B(CreateArrayLiteral), U8(1), U8(3), U8(17),
                 B(JumpIfUndefined), U8(72),
                 B(JumpIfNull), U8(70),
                 B(ToObject), R(1),
@@ -205,9 +205,9 @@ parameter count: 1
 bytecode array length: 62
 bytecodes: [
   /*   30 E> */ B(StackCheck),
-  /*   42 S> */ B(CreateArrayLiteral), U8(0), U8(2), U8(9),
+  /*   42 S> */ B(CreateArrayLiteral), U8(0), U8(2), U8(17),
                 B(Star), R(0),
-  /*   72 S> */ B(CreateArrayLiteral), U8(1), U8(3), U8(9),
+  /*   72 S> */ B(CreateArrayLiteral), U8(1), U8(3), U8(17),
                 B(JumpIfUndefined), U8(49),
                 B(JumpIfNull), U8(47),
                 B(ToObject), R(1),