Tear down v8 after pdf library is released

pdf/pdfium/pdfium_engine.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "pdf/pdfium/pdfium_engine.h"
 
 #include <math.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 500 matching lines @@
   // Font loading doesn't work in the renderer sandbox in Linux.
   FPDF_SetSystemFontInfo(&g_font_info);
 #endif
 
   FSDK_SetUnSpObjProcessHandler(&g_unsupported_info);
 
   return true;
 }
 
 void ShutdownSDK() {
+  FPDF_DestroyLibrary();
   TearDownV8();
-  FPDF_DestroyLibrary();
 }
 
 PDFEngine* PDFEngine::Create(PDFEngine::Client* client) {
   return new PDFiumEngine(client);
 }
 
 PDFiumEngine::PDFiumEngine(PDFEngine::Client* client)
     : client_(client),
       current_zoom_(1.0),
       current_rotation_(0),
@@ skipping 3340 matching lines @@
   FPDF_DOCUMENT doc =
       FPDF_LoadMemDocument(pdf_buffer, pdf_buffer_size, nullptr);
   if (!doc)
     return false;
   bool success = FPDF_GetPageSizeByIndex(doc, page_number, width, height) != 0;
   FPDF_CloseDocument(doc);
   return success;
 }
 
 }  // namespace chrome_pdf