Use phantom handles instead of weak handles

fpdfsdk/include/javascript/JS_Object.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 _JS_OBJECT_H_
 #define _JS_OBJECT_H_
 
 #include "../fsdk_define.h"  // For FX_UINT
@@ skipping 28 matching lines @@
         CJS_Object*                                     m_pJSObject;
 };
 
 class CJS_Object 
 {
 public:
         CJS_Object(JSFXObject pObject);
         virtual ~CJS_Object(void);
 
         void                                            MakeWeak();
+        void                                            Dispose();
 
         virtual FX_BOOL                         IsType(FX_LPCSTR sClassName){return TRUE;};
         virtual CFX_ByteString          GetClassName(){return "";};
 
         virtual FX_BOOL                         InitInstance(IFXJS_Context* cc){return TRUE;};
         virtual FX_BOOL                         ExitInstance(){return TRUE;};
 
         operator                                        JSFXObject () {return v8::Local<v8::Object>::New(m_pIsolate, m_pObject);}
         operator                                        CJS_EmbedObj* (){return m_pEmbedObj;};
 
@@ skipping 225 matching lines @@
         FX_DWORD                                                        m_dwStartTime;
         FX_DWORD                                                        m_dwTimeOut;
         FX_DWORD                                                m_dwElapse;
         CJS_Runtime*                                    m_pRuntime;
         CFX_WideString                                  m_swJScript;
         int                                                             m_nType; //0:Interval; 1:TimeOut
 
         CPDFDoc_Environment*                    m_pApp;
 };
 #endif //_JS_OBJECT_H_