Use override in more classes in core/

core/src/fxcodec/codec/fx_codec_jpeg.cpp

 // 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
 
 #include <setjmp.h>
 
 #include "../../../include/fxcodec/fx_codec.h"
 #include "../../../include/fxcrt/fx_safe_types.h"
@@ skipping 269 matching lines @@
   bits_per_components = cinfo.data_precision;
   if (icc_buf_ptr != NULL) {
     *icc_buf_ptr = NULL;
   }
   if (icc_length != NULL) {
     *icc_length = 0;
   }
   jpeg_destroy_decompress(&cinfo);
   return TRUE;
 }
+
 class CCodec_JpegDecoder : public CCodec_ScanlineDecoder {
  public:
   CCodec_JpegDecoder();
-  ~CCodec_JpegDecoder();
+  ~CCodec_JpegDecoder() override;
+
   FX_BOOL Create(const uint8_t* src_buf,
                  FX_DWORD src_size,
                  int width,
                  int height,
                  int nComps,
                  FX_BOOL ColorTransform,
                  IFX_JpegProvider* pJP);
-  virtual void Destroy() { delete this; }
-  virtual void v_DownScale(int dest_width, int dest_height);
-  virtual FX_BOOL v_Rewind();
-  virtual uint8_t* v_GetNextLine();
-  virtual FX_DWORD GetSrcOffset();
+  void Destroy() { delete this; }
+
+  // CCodec_ScanlineDecoder
+  void v_DownScale(int dest_width, int dest_height) override;
+  FX_BOOL v_Rewind() override;
+  uint8_t* v_GetNextLine() override;
+  FX_DWORD GetSrcOffset() override;
+
+  FX_BOOL InitDecode();
+
   jmp_buf m_JmpBuf;
   struct jpeg_decompress_struct cinfo;
   struct jpeg_error_mgr jerr;
   struct jpeg_source_mgr src;
   const uint8_t* m_SrcBuf;
   FX_DWORD m_SrcSize;
   uint8_t* m_pScanlineBuf;
-  FX_BOOL InitDecode();
-  FX_BOOL m_bInited, m_bStarted, m_bJpegTransform;
+
+  FX_BOOL m_bInited;
+  FX_BOOL m_bStarted;
+  FX_BOOL m_bJpegTransform;
 
  protected:
   IFX_JpegProvider* m_pExtProvider;
   void* m_pExtContext;
   FX_DWORD m_nDefaultScaleDenom;
 };
+
 CCodec_JpegDecoder::CCodec_JpegDecoder() {
   m_pScanlineBuf = NULL;
   m_DownScale = 1;
   m_bStarted = FALSE;
   m_bInited = FALSE;
   m_pExtProvider = NULL;
   m_pExtContext = NULL;
   FXSYS_memset(&cinfo, 0, sizeof(cinfo));
   FXSYS_memset(&jerr, 0, sizeof(jerr));
   FXSYS_memset(&src, 0, sizeof(src));
@@ skipping 371 matching lines @@
   }
   if (avail_buf_ptr != NULL) {
     *avail_buf_ptr = NULL;
     if (((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer > 0) {
       *avail_buf_ptr =
           (uint8_t*)((FXJPEG_Context*)pContext)->m_SrcMgr.next_input_byte;
     }
   }
   return (FX_DWORD)((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer;
 }