Plumb in an externally created v8::Isolate

testing/embedder_test.cpp

 // Copyright (c) 2015 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.
 
 #include "embedder_test.h"
 
 #include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 194 matching lines @@
     document_ = FPDF_LoadCustomDocument(&file_access_, nullptr);
   } else {
     document_ = FPDFAvail_GetDocument(avail_, nullptr);
   }
 
   (void) FPDF_GetDocPermissions(document_);
   (void) FPDFAvail_IsFormAvail(avail_, &hints_);
 
   IPDF_JSPLATFORM* platform = static_cast<IPDF_JSPLATFORM*>(this);
   memset(platform, 0, sizeof(IPDF_JSPLATFORM));
-  platform->version = 1;
+  platform->version = 2;
   platform->app_alert = AlertTrampoline;
 
   FPDF_FORMFILLINFO* formfillinfo = static_cast<FPDF_FORMFILLINFO*>(this);
   memset(formfillinfo, 0, sizeof(FPDF_FORMFILLINFO));
   formfillinfo->version = 1;
   formfillinfo->FFI_SetTimer = SetTimerTrampoline;
   formfillinfo->FFI_KillTimer = KillTimerTrampoline;
   formfillinfo->m_pJsPlatform = platform;
 
   form_handle_ = FPDFDOC_InitFormFillEnvironment(document_, formfillinfo);
@@ skipping 79 matching lines @@
 }
 
 // Can't use gtest-provided main since we need to stash the path to the
 // executable in order to find the external V8 binary data files.
 int main(int argc, char** argv) {
   g_exe_path_ = argv[0];
   testing::InitGoogleTest(&argc, argv);
   testing::InitGoogleMock(&argc, argv);
   return RUN_ALL_TESTS();
 }