CFXJS_ObjDefinition's lifetime must match isolate.

fpdfsdk/src/jsapi/fxjs_v8.cpp

Index: fpdfsdk/src/jsapi/fxjs_v8.cpp
diff --git a/fpdfsdk/src/jsapi/fxjs_v8.cpp b/fpdfsdk/src/jsapi/fxjs_v8.cpp
index 4e069d52a33f5d0f4f43f6bd90eaa318cbef2a55..ed8e2e856304bb9c8fe50e06f151f29c8381a16e 100644
--- a/fpdfsdk/src/jsapi/fxjs_v8.cpp
+++ b/fpdfsdk/src/jsapi/fxjs_v8.cpp
@@ -351,12 +351,14 @@ void FXJS_ReleaseRuntime(v8::Isolate* pIsolate,
         pObjDef->m_pDestructor(pObj);
       FXJS_FreePrivate(pObj);
     }
-    delete pObjDef;
   }
 
   if (pIsolate == g_isolate && --g_isolate_ref_count > 0)
     return;
 
+  for (int i = 0; i < maxID; ++i)
+    delete CFXJS_ObjDefinition::ForID(pIsolate, i);
+
   pIsolate->SetData(g_embedderDataSlot, nullptr);
   delete pData;
 }