Fix a leak with g_DefaultGlobalObjectTemplate.

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 127 matching lines @@
     ASSERT(g_embedderDataSlot == embedderDataSlot);
     ASSERT(g_isolate == pIsolate);
     return;
   }
   g_embedderDataSlot = embedderDataSlot;
   g_isolate = pIsolate;
 }
 
 void FXJS_Release() {
   ASSERT(!g_isolate || g_isolate_ref_count == 0);
+  delete g_DefaultGlobalObjectTemplate;
   g_DefaultGlobalObjectTemplate = nullptr;
   g_isolate = nullptr;
 
   delete g_arrayBufferAllocator;
   g_arrayBufferAllocator = nullptr;
 }
 
 bool FXJS_GetIsolate(v8::Isolate** pResultIsolate) {
   if (g_isolate) {
     *pResultIsolate = g_isolate;
@@ skipping 619 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;
 }