Merge to XFA: Make the vast majority of JS headers private to src/javascript.

fpdfsdk/include/javascript/IJavaScript.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 FPDFSDK_INCLUDE_JAVASCRIPT_IJAVASCRIPT_H_
 #define FPDFSDK_INCLUDE_JAVASCRIPT_IJAVASCRIPT_H_
 
 #include "../../../core/include/fxcrt/fx_string.h"
@@ skipping 116 matching lines @@
   virtual void OnExternal_Exec() = 0;
 
   virtual void EnableMessageBox(FX_BOOL bEnable) = 0;
 
  protected:
   virtual ~IFXJS_Context() {}
 };
 
 class IFXJS_Runtime {
  public:
+  static IFXJS_Runtime* Create(CPDFDoc_Environment* pEnv);
   virtual ~IFXJS_Runtime() {}
 
   virtual IFXJS_Context* NewContext() = 0;
   virtual void ReleaseContext(IFXJS_Context* pContext) = 0;
   virtual IFXJS_Context* GetCurrentContext() = 0;
   virtual void SetReaderDocument(CPDFSDK_Document* pReaderDoc) = 0;
 
   virtual CPDFSDK_Document* GetReaderDocument() = 0;
 
   virtual FX_BOOL GetHValueByName(const CFX_ByteStringC& utf8Name,
                                   FXJSE_HVALUE hValue) = 0;
   virtual FX_BOOL SetHValueByName(const CFX_ByteStringC& utf8Name,
                                   FXJSE_HVALUE hValue) = 0;
+
+ protected:
+  IFXJS_Runtime() {}
 };
 
 #endif  // FPDFSDK_INCLUDE_JAVASCRIPT_IJAVASCRIPT_H_