Fix keyed element access wrt string wrappers

src/arm64/macro-assembler-arm64.cc

Index: src/arm64/macro-assembler-arm64.cc
diff --git a/src/arm64/macro-assembler-arm64.cc b/src/arm64/macro-assembler-arm64.cc
index c30f619215517a53c36d1f3b84847fda53ea403c..254d6d074b56aa0160c3e72a7b14b429d43ed1f4 100644
--- a/src/arm64/macro-assembler-arm64.cc
+++ b/src/arm64/macro-assembler-arm64.cc
@@ -4397,21 +4397,29 @@ void MacroAssembler::JumpIfDictionaryInPrototypeChain(
     Register scratch1,
     Label* found) {
   DCHECK(!AreAliased(object, scratch0, scratch1));
-  Factory* factory = isolate()->factory();
   Register current = scratch0;
-  Label loop_again;
+  Label loop_again, end;
 
   // Scratch contains elements pointer.
   Mov(current, object);
+  Ldr(current, FieldMemOperand(current, HeapObject::kMapOffset));
+  Ldr(current, FieldMemOperand(current, Map::kPrototypeOffset));
+  CompareAndBranch(current, Heap::kNullValueRootIndex, eq, &end);
 
   // Loop based on the map going up the prototype chain.
   Bind(&loop_again);
   Ldr(current, FieldMemOperand(current, HeapObject::kMapOffset));
+  STATIC_ASSERT(JS_PROXY_TYPE < JS_OBJECT_TYPE);
+  STATIC_ASSERT(JS_VALUE_TYPE < JS_OBJECT_TYPE);
+  CompareInstanceType(current, scratch1, JS_OBJECT_TYPE);
+  B(lo, found);
   Ldrb(scratch1, FieldMemOperand(current, Map::kBitField2Offset));
   DecodeField<Map::ElementsKindBits>(scratch1);
   CompareAndBranch(scratch1, DICTIONARY_ELEMENTS, eq, found);
   Ldr(current, FieldMemOperand(current, Map::kPrototypeOffset));
-  CompareAndBranch(current, Operand(factory->null_value()), ne, &loop_again);
+  CompareAndBranch(current, Heap::kNullValueRootIndex, ne, &loop_again);
+
+  Bind(&end);
 }