Pass v8::Isolate to PDFium at init time.

public/fpdf_formfill.h

 // 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
 
 #ifndef PUBLIC_FPDF_FORMFILL_H_
 #define PUBLIC_FPDF_FORMFILL_H_
 
 #include "fpdfview.h"
@@ skipping 275 matching lines @@
                       void* filePath,
                       int length);
 
   /**
   *   pointer to FPDF_FORMFILLINFO interface.
   **/
   void* m_pFormfillinfo;
 
   /* Version 2. */
 
-  /**
-  *   pointer to the v8::Isolate to use, or NULL to force PDFium to create one.
-  **/
-  void* m_isolate;
+  void* m_isolate;               /* Unused in v3, retain for compatibility. */
+  unsigned int m_v8EmbedderSlot; /* Unused in v3, retain for compatibility. */
 
-  /**
-   *   The embedder data slot to use in the v8::Isolate to store PDFium's
-   *   per-isolate data. The value needs to be between 0 and
-   *   v8::Internals::kNumIsolateDataLots (exclusive).
-   */
-  unsigned int m_v8EmbedderSlot;
+  /* Version 3. */
+  /* Version 3 moves m_Isolate and m_v8EmbedderSlot to FPDF_LIBRARY_CONFIG. */
+
 } IPDF_JSPLATFORM;
 
 // Flags for Cursor type
 #define FXCT_ARROW 0
 #define FXCT_NESW 1
 #define FXCT_NWSE 2
 #define FXCT_VBEAM 3
 #define FXCT_HBEAM 4
 #define FXCT_HAND 5
 
@@ skipping 789 matching lines @@
                                     int size_x,
                                     int size_y,
                                     int rotate,
                                     int flags);
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif  // PUBLIC_FPDF_FORMFILL_H_