Push v8::Isolate into CFXJS_Engine class

fpdfsdk/javascript/ijs_runtime.h

 // Copyright 2016 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 FPDFSDK_JAVASCRIPT_IJS_RUNTIME_H_
 #define FPDFSDK_JAVASCRIPT_IJS_RUNTIME_H_
 
 #include "core/fxcrt/include/fx_string.h"
@@ skipping 13 matching lines @@
   static void Initialize(unsigned int slot, void* isolate);
   static void Destroy();
   static IJS_Runtime* Create(CPDFDoc_Environment* pEnv);
   virtual ~IJS_Runtime() {}
 
   virtual IJS_Context* NewContext() = 0;
   virtual void ReleaseContext(IJS_Context* pContext) = 0;
   virtual IJS_Context* GetCurrentContext() = 0;
   virtual void SetReaderDocument(CPDFSDK_Document* pReaderDoc) = 0;
   virtual CPDFSDK_Document* GetReaderDocument() = 0;
-  virtual int Execute(const CFX_WideString& script, CFX_WideString* info) = 0;
+  virtual int ExecuteScript(const CFX_WideString& script,
+                            CFX_WideString* info) = 0;
 
 #ifdef PDF_ENABLE_XFA
   virtual FX_BOOL GetValueByName(const CFX_ByteStringC& utf8Name,
                                  CFXJSE_Value* pValue) = 0;
   virtual FX_BOOL SetValueByName(const CFX_ByteStringC& utf8Name,
                                  CFXJSE_Value* pValue) = 0;
 #endif  // PDF_ENABLE_XFA
 
  protected:
   IJS_Runtime() {}
 };
 
 #endif  // FPDFSDK_JAVASCRIPT_IJS_RUNTIME_H_