Don't let JSON parsed objects hit inherited setters.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 163b713ad1e23267f3aa315686f7c0625a58ca0c..0295fd35048c58cd30376f6b950e15a8cd46b6cd 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1505,11 +1505,15 @@ class JSObject: public HeapObject {
   bool HasElementWithInterceptor(JSObject* receiver, uint32_t index);
   bool HasElementPostInterceptor(JSObject* receiver, uint32_t index);
 
-  MUST_USE_RESULT MaybeObject* SetFastElement(uint32_t index, Object* value);
+  MUST_USE_RESULT MaybeObject* SetFastElement(uint32_t index,
+                                              Object* value,
+                                              bool own = false);
 
   // Set the index'th array element.
   // A Failure object is returned if GC is needed.
-  MUST_USE_RESULT MaybeObject* SetElement(uint32_t index, Object* value);
+  MUST_USE_RESULT MaybeObject* SetElement(uint32_t index,
+                                          Object* value,
+                                          bool own = false);
 
   // Returns the index'th element.
   // The undefined object if index is out of bounds.
@@ -1763,9 +1767,11 @@ class JSObject: public HeapObject {
                                       Object* value,
                                       JSObject* holder);
   MUST_USE_RESULT MaybeObject* SetElementWithInterceptor(uint32_t index,
-                                                         Object* value);
+                                                         Object* value,
+                                                         bool own);
   MUST_USE_RESULT MaybeObject* SetElementWithoutInterceptor(uint32_t index,
-                                                            Object* value);
+                                                            Object* value,
+                                                            bool own);
 
   MaybeObject* GetElementPostInterceptor(JSObject* receiver, uint32_t index);