Fix memory leak in FXJS_ReleaseRuntime.

fpdfsdk/src/jsapi/fxjs_v8.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../../include/jsapi/fxjs_v8.h"
 
 #include "../../../core/include/fxcrt/fx_basic.h"
 
@@ skipping 317 matching lines @@
       v8::Local<v8::Context>::New(pIsolate, v8PersistentContext);
   v8::Context::Scope context_scope(context);
 
   FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(pIsolate);
   if (!pData)
     return;
 
   int maxID = CFXJS_ObjDefinition::MaxID(pIsolate);
   for (int i = 0; i < maxID; ++i) {
     CFXJS_ObjDefinition* pObjDef = CFXJS_ObjDefinition::ForID(pIsolate, i);
-    if (!pObjDef->m_StaticObj.IsEmpty()) {
-      v8::Local<v8::Object> pObj =
-          v8::Local<v8::Object>::New(pIsolate, pObjDef->m_StaticObj);
+    v8::Local<v8::Object> pObj;
+    if (pObjDef->m_ObjType == FXJSOBJTYPE_GLOBAL) {
+      pObj =
+          context->Global()->GetPrototype()->ToObject(context).ToLocalChecked();
+    } else if (!pObjDef->m_StaticObj.IsEmpty()) {
+      pObj = v8::Local<v8::Object>::New(pIsolate, pObjDef->m_StaticObj);
+    }
+
+    if (!pObj.IsEmpty()) {
       if (pObjDef->m_pDestructor)
         pObjDef->m_pDestructor(pObj);
       FXJS_FreePrivate(pObj);
     }
     delete pObjDef;
   }
 
   pIsolate->SetData(g_embedderDataSlot, nullptr);
   delete pData;
 }
@@ skipping 395 matching lines @@
     return v8::Local<v8::Array>();
   v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
   return v8::Local<v8::Array>::Cast(pValue->ToObject(context).ToLocalChecked());
 }
 
 void FXJS_ValueCopy(v8::Local<v8::Value>& pTo, v8::Local<v8::Value> pFrom) {
   pTo = pFrom;
 }