[crankshaft] Fix property access with proxies in prototype chain

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 722a5424c03dd86386af88cc41f5caf5c2d063b9..45e02953c5939ea506abe9f118e58bab37006006 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -6339,6 +6339,7 @@ class Map: public HeapObject {
   bool IsJSObjectMap() {
     return instance_type() >= FIRST_JS_OBJECT_TYPE;
   }
+  bool IsJSReceiverMap() { return instance_type() >= FIRST_JS_RECEIVER_TYPE; }
   bool IsStringMap() { return instance_type() < FIRST_NONSTRING_TYPE; }
   bool IsJSProxyMap() {
     InstanceType type = instance_type();