Make code compile with clang_use_chrome_plugin (part V)

xfa/fxfa/parser/xfa_basic_imp.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 XFA_FXFA_PARSER_XFA_BASIC_IMP_H_
 #define XFA_FXFA_PARSER_XFA_BASIC_IMP_H_
 
 #include "xfa/fgas/crt/fgas_stream.h"
 #include "xfa/fxfa/include/fxfa_basic.h"
 
 struct XFA_NOTSUREATTRIBUTE {
   XFA_ELEMENT eElement;
   XFA_ATTRIBUTE eAttribute;
   XFA_ATTRIBUTETYPE eType;
   void* pValue;
 };
 const XFA_NOTSUREATTRIBUTE* XFA_GetNotsureAttribute(
     XFA_ELEMENT eElement,
     XFA_ATTRIBUTE eAttribute,
     XFA_ATTRIBUTETYPE eType = XFA_ATTRIBUTETYPE_NOTSURE);
 
 class CXFA_WideTextRead : public IFX_Stream {
  public:
   CXFA_WideTextRead(const CFX_WideString& wsBuffer);
-  virtual void Release();
-  virtual IFX_Stream* Retain();
 
-  virtual uint32_t GetAccessModes() const;
-  virtual int32_t GetLength() const;
-  virtual int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset);
-  virtual int32_t GetPosition();
-  virtual FX_BOOL IsEOF() const;
+  // IFX_Stream
+  void Release() override;
+  IFX_Stream* Retain() override;
+  uint32_t GetAccessModes() const override;
+  int32_t GetLength() const override;
+  int32_t Seek(FX_STREAMSEEK eSeek, int32_t iOffset) override;
+  int32_t GetPosition() override;
+  FX_BOOL IsEOF() const override;
+  int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) override;
+  int32_t ReadString(FX_WCHAR* pStr,
+                     int32_t iMaxLength,
+                     FX_BOOL& bEOS,
+                     int32_t const* pByteSize = NULL) override;
+  int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) override;
+  int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength) override;
+  void Flush() override {}
+  FX_BOOL SetLength(int32_t iLength) override;
+  int32_t GetBOM(uint8_t bom[4]) const override;
+  uint16_t GetCodePage() const override;
+  uint16_t SetCodePage(uint16_t wCodePage) override;
+  IFX_Stream* CreateSharedStream(uint32_t dwAccess,
+                                 int32_t iOffset,
+                                 int32_t iLength) override;
 
-  virtual int32_t ReadData(uint8_t* pBuffer, int32_t iBufferSize) { return 0; }
-  virtual int32_t ReadString(FX_WCHAR* pStr,
-                             int32_t iMaxLength,
-                             FX_BOOL& bEOS,
-                             int32_t const* pByteSize = NULL);
-  virtual int32_t WriteData(const uint8_t* pBuffer, int32_t iBufferSize) {
-    return 0;
-  }
-  virtual int32_t WriteString(const FX_WCHAR* pStr, int32_t iLength) {
-    return 0;
-  }
-  virtual void Flush() {}
-  virtual FX_BOOL SetLength(int32_t iLength) { return FALSE; }
+  virtual void Lock();
+  virtual void Unlock();
 
-  virtual int32_t GetBOM(uint8_t bom[4]) const { return 0; }
-  virtual uint16_t GetCodePage() const;
-  virtual uint16_t SetCodePage(uint16_t wCodePage);
-
-  virtual void Lock() {}
-  virtual void Unlock() {}
-
-  virtual IFX_Stream* CreateSharedStream(uint32_t dwAccess,
-                                         int32_t iOffset,
-                                         int32_t iLength) {
-    return NULL;
-  }
-
-  CFX_WideString GetSrcText() const { return m_wsBuffer; }
+  CFX_WideString GetSrcText() const;
 
  protected:
   CFX_WideString m_wsBuffer;
   int32_t m_iPosition;
   int32_t m_iRefCount;
 };
 
 #endif  // XFA_FXFA_PARSER_XFA_BASIC_IMP_H_