Pdfium does not create isolate when it runs in chromium

fpdfsdk/src/fpdfview.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 "public/fpdfview.h"
 
 #include <memory>
 
@@ skipping 223 matching lines @@
 
   CFX_GEModule::Create(cfg ? cfg->m_pUserFontPaths : nullptr);
   CFX_GEModule::Get()->SetCodecModule(g_pCodecModule);
 
   CPDF_ModuleMgr::Create();
   CPDF_ModuleMgr* pModuleMgr = CPDF_ModuleMgr::Get();
   pModuleMgr->SetCodecModule(g_pCodecModule);
   pModuleMgr->InitPageModule();
   pModuleMgr->InitRenderModule();
 #ifdef PDF_ENABLE_XFA
-  CPDFXFA_App::GetInstance()->Initialize();
+  CPDFXFA_App::GetInstance()->Initialize(
+      (cfg && cfg->version >= 2) ? (FXJSE_HRUNTIME)cfg->m_pIsolate : nullptr);

[jun_fang, 2016/02/01 11:01:19]

Use C++ style cast.

[jun_fang, 2016/02/01 11:01:19]

currently, we don't have the version which is larger than 2. 
So I prefer cfg->version == 2.

[Jim Wang, 2016/02/02 03:43:17]

Follow the code in line 252.

[Jim Wang, 2016/02/02 03:43:17]

Done.

 #else   // PDF_ENABLE_XFA
   pModuleMgr->LoadEmbeddedGB1CMaps();
   pModuleMgr->LoadEmbeddedJapan1CMaps();
   pModuleMgr->LoadEmbeddedCNS1CMaps();
   pModuleMgr->LoadEmbeddedKorea1CMaps();
 #endif  // PDF_ENABLE_XFA
   if (cfg && cfg->version >= 2)
     IJS_Runtime::Initialize(cfg->m_v8EmbedderSlot, cfg->m_pIsolate);
 }
 
@@ skipping 938 matching lines @@
   if (!buffer) {
     *buflen = len;
   } else if (*buflen >= len) {
     memcpy(buffer, utf16Name.c_str(), len);
     *buflen = len;
   } else {
     *buflen = -1;
   }
   return (FPDF_DEST)pDestObj;
 }