Don't pass null isolates to FXJS_ when we have a real isolate.

fpdfsdk/src/jsapi/fxjs_v8.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 "../../../core/include/fxcrt/fx_basic.h"
 #include "../../include/fsdk_define.h"
 #include "../../include/jsapi/fxjs_v8.h"
 
@@ skipping 471 matching lines @@
   if (pObj->IsDate())
     return kFXJSValueNameDate;
   if (pObj->IsObject())
     return kFXJSValueNameObject;
   if (pObj->IsNull())
     return kFXJSValueNameNull;
   if (pObj->IsUndefined())
     return kFXJSValueNameUndefined;
   return NULL;
 }
-void FXJS_SetPrivate(v8::Local<v8::Object> pObj, void* p) {
-  FXJS_SetPrivate(NULL, pObj, p);
-}
-
-void* FXJS_GetPrivate(v8::Local<v8::Object> pObj) {
-  return FXJS_GetPrivate(NULL, pObj);
-}
 
 void FXJS_SetPrivate(v8::Isolate* pIsolate,
                      v8::Local<v8::Object> pObj,
                      void* p) {
   if (pObj.IsEmpty() || !pObj->InternalFieldCount())
     return;
   CFXJS_PrivateData* pPrivateData =
       (CFXJS_PrivateData*)pObj->GetAlignedPointerFromInternalField(0);
   if (!pPrivateData)
     return;
   pPrivateData->pPrivate = p;
 }
 
 void* FXJS_GetPrivate(v8::Isolate* pIsolate, v8::Local<v8::Object> pObj) {
   if (pObj.IsEmpty())
-    return NULL;
-  CFXJS_PrivateData* pPrivateData = NULL;
-  if (pObj->InternalFieldCount())
+    return nullptr;
+  CFXJS_PrivateData* pPrivateData = nullptr;
+  if (pObj->InternalFieldCount()) {
     pPrivateData =
         (CFXJS_PrivateData*)pObj->GetAlignedPointerFromInternalField(0);
-  else {
+  } else {
     // It could be a global proxy object.
     v8::Local<v8::Value> v = pObj->GetPrototype();
-    v8::Isolate* isolate = (v8::Isolate*)pIsolate;
-    v8::Local<v8::Context> context = isolate->GetCurrentContext();
+    v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
     if (v->IsObject())
       pPrivateData = (CFXJS_PrivateData*)v->ToObject(context)
                          .ToLocalChecked()
                          ->GetAlignedPointerFromInternalField(0);
   }
-  if (!pPrivateData)
-    return NULL;
-  return pPrivateData->pPrivate;
+  return pPrivateData ? pPrivateData->pPrivate : nullptr;
 }
 
 void FXJS_FreePrivate(void* pPrivateData) {
   delete (CFXJS_PrivateData*)pPrivateData;
 }
 
 void FXJS_FreePrivate(v8::Local<v8::Object> pObj) {
   if (pObj.IsEmpty() || !pObj->InternalFieldCount())
     return;
   FXJS_FreePrivate(pObj->GetAlignedPointerFromInternalField(0));
@@ skipping 228 matching lines @@
     return v8::Local<v8::Array>();
   v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
   return v8::Local<v8::Array>::Cast(pValue->ToObject(context).ToLocalChecked());
 }
 
 void FXJS_ValueCopy(v8::Local<v8::Value>& pTo, v8::Local<v8::Value> pFrom) {
   pTo = pFrom;
 }