Make code compile with clang_use_chrome_plugin (part IV)

fpdfsdk/javascript/cjs_runtime.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_JAVASCRIPT_CJS_RUNTIME_H_
 #define FPDFSDK_JAVASCRIPT_CJS_RUNTIME_H_
 
 #include <map>
@@ skipping 24 matching lines @@
   static CJS_Runtime* FromContext(const IJS_Context* cc);
 
   explicit CJS_Runtime(CPDFDoc_Environment* pApp);
   ~CJS_Runtime() override;
 
   // IJS_Runtime
   IJS_Context* NewContext() override;
   void ReleaseContext(IJS_Context* pContext) override;
   IJS_Context* GetCurrentContext() override;
   void SetReaderDocument(CPDFSDK_Document* pReaderDoc) override;
-  CPDFSDK_Document* GetReaderDocument() override { return m_pDocument; }
+  CPDFSDK_Document* GetReaderDocument() override;
   int Execute(const CFX_WideString& script, CFX_WideString* info) override;
 
   CPDFDoc_Environment* GetReaderApp() const { return m_pApp; }
 
   // Returns true if the event isn't already found in the set.
   bool AddEventToSet(const FieldEvent& event);
   void RemoveEventFromSet(const FieldEvent& event);
 
   void BeginBlock() { m_bBlocking = TRUE; }
   void EndBlock() { m_bBlocking = FALSE; }
@@ skipping 25 matching lines @@
   std::set<FieldEvent> m_FieldEventSet;
   v8::Isolate* m_isolate;
   bool m_isolateManaged;
   v8::Global<v8::Context> m_context;
   std::vector<v8::Global<v8::Object>*> m_StaticObjects;
   std::map<CFX_WideString, v8::Global<v8::Array>> m_ConstArrays;
   std::set<Observer*> m_observers;
 };
 
 #endif  // FPDFSDK_JAVASCRIPT_CJS_RUNTIME_H_