Propagate exceptions thrown when setting elements.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index bf598307a2f456dd618289aa0b431255f4e816ee..8087f7f673ffe7fdd4ff1e960329101dc486fec7 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1579,7 +1579,8 @@ class JSObject: public HeapObject {
   void LookupRealNamedProperty(String* name, LookupResult* result);
   void LookupRealNamedPropertyInPrototypes(String* name, LookupResult* result);
   void LookupCallbackSetterInPrototypes(String* name, LookupResult* result);
-  bool SetElementWithCallbackSetterInPrototypes(uint32_t index, Object* value);
+  MUST_USE_RESULT MaybeObject*
+      SetElementWithCallbackSetterInPrototypes(uint32_t index, Object* value);
   void LookupCallback(String* name, LookupResult* result);
 
   // Returns the number of properties on this object filtering out properties