Fix (nearly all) IWYU in fpdfskd/include/javascript/ headers.

fpdfsdk/include/javascript/global.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 _GLOBAL_H_
 #define _GLOBAL_H_
 
+#include "JS_Define.h"
+
 class CJS_GlobalData;
+class CJS_GlobalVariableArray;
+class CJS_KeyValue;
 
 struct js_global_data
 {
         js_global_data()
         {
                 nType = 0;
                 dData = 0;
                 bData = FALSE;
                 sData = "";
                 bPersistent = FALSE;
@@ skipping 55 matching lines @@
 
         virtual FX_BOOL InitInstance(IFXJS_Context* cc);        
 
         DECLARE_SPECIAL_JS_CLASS(CJS_Global);
 
         JS_SPECIAL_STATIC_METHOD(setPersistent, global_alternate, global);
 
 };
 
 #endif //_GLOBAL_H_