Revert of Make the CPDFXFA_App non-global

fpdfsdk/cpdfsdk_formfillenvironment.cpp

 // Copyright 2016 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 "fpdfsdk/cpdfsdk_formfillenvironment.h"
 
 #include <memory>
 
@@ skipping 40 matching lines @@
   // |m_pAnnotHandlerMgr| will try to access |m_pFormFiller|
   // when it cleans up. So, we must make sure it is cleaned up before
   // |m_pFormFiller|.
   m_pAnnotHandlerMgr.reset();
 
   // Must destroy the |m_pFormFiller| before the environment (|this|)
   // because any created form widgets hold a pointer to the environment.
   // Those widgets may call things like KillTimer() as they are shutdown.
   m_pFormFiller.reset();
 
+#ifdef PDF_ENABLE_XFA
+  CPDFXFA_App* pProvider = CPDFXFA_App::GetInstance();
+  if (pProvider->m_pFormFillEnvList.GetSize() == 0)
+    pProvider->SetJavaScriptInitialized(FALSE);
+#endif  // PDF_ENABLE_XFA
   if (m_pInfo && m_pInfo->Release)
     m_pInfo->Release(m_pInfo);
 }
 
 int CPDFSDK_FormFillEnvironment::JS_appAlert(const FX_WCHAR* Msg,
                                              const FX_WCHAR* Title,
                                              uint32_t Type,
                                              uint32_t Icon) {
   if (!m_pInfo || !m_pInfo->m_pJsPlatform ||
       !m_pInfo->m_pJsPlatform->app_alert) {
@@ skipping 685 matching lines @@
     } else {
       m_pFocusAnnot.Reset(pFocusAnnot.Get());
     }
   }
   return FALSE;
 }
 
 FX_BOOL CPDFSDK_FormFillEnvironment::GetPermissions(int nFlag) {
   return GetPDFDocument()->GetUserPermissions() & nFlag;
 }