7 files changed, 8 insertions, 8 deletions
diff --git a/core/fxcodec/codec/ccodec_pngmodule.cpp b/core/fxcodec/codec/ccodec_pngmodule.cpp
index 98db4e272e..2c22f6bdba 100644
--- a/core/fxcodec/codec/ccodec_pngmodule.cpp
+++ b/core/fxcodec/codec/ccodec_pngmodule.cpp
@@ -23,7 +23,7 @@
 
 #define PNG_ERROR_SIZE 256
 
-class CPngContext : public CCodec_PngModule::Context {
+class CPngContext final : public CCodec_PngModule::Context {
  public:
   CPngContext(CCodec_PngModule* pModule, CCodec_PngModule::Delegate* pDelegate);
   ~CPngContext() override;
diff --git a/core/fxcodec/codec/ccodec_tiffmodule.cpp b/core/fxcodec/codec/ccodec_tiffmodule.cpp
index 5f74b28cdc..78f631cba9 100644
--- a/core/fxcodec/codec/ccodec_tiffmodule.cpp
+++ b/core/fxcodec/codec/ccodec_tiffmodule.cpp
@@ -32,7 +32,7 @@ struct TiffDeleter {
 
 }  // namespace
 
-class CTiffContext : public CCodec_TiffModule::Context {
+class CTiffContext final : public CCodec_TiffModule::Context {
  public:
   CTiffContext() = default;
   ~CTiffContext() override = default;
diff --git a/core/fxcodec/codec/cfx_codec_memory.h b/core/fxcodec/codec/cfx_codec_memory.h
index e726dc5320..2907e892d2 100644
--- a/core/fxcodec/codec/cfx_codec_memory.h
+++ b/core/fxcodec/codec/cfx_codec_memory.h
@@ -8,7 +8,7 @@
 #include "core/fxcrt/retain_ptr.h"
 #include "third_party/base/span.h"
 
-class CFX_CodecMemory : public Retainable {
+class CFX_CodecMemory final : public Retainable {
  public:
   template <typename T, typename... Args>
   friend RetainPtr<T> pdfium::MakeRetain(Args&&... args);
diff --git a/core/fxcodec/codec/fx_codec.cpp b/core/fxcodec/codec/fx_codec.cpp
index 54245a5b99..053aa71da2 100644
--- a/core/fxcodec/codec/fx_codec.cpp
+++ b/core/fxcodec/codec/fx_codec.cpp
@@ -1517,7 +1517,7 @@ CFX_DIBAttribute::~CFX_DIBAttribute() {
 }
 #endif  // PDF_ENABLE_XFA
 
-class CCodec_RLScanlineDecoder : public CCodec_ScanlineDecoder {
+class CCodec_RLScanlineDecoder final : public CCodec_ScanlineDecoder {
  public:
   CCodec_RLScanlineDecoder();
   ~CCodec_RLScanlineDecoder() override;
diff --git a/core/fxcodec/codec/fx_codec_fax.cpp b/core/fxcodec/codec/fx_codec_fax.cpp
index aabc110010..c6e71b6b60 100644
--- a/core/fxcodec/codec/fx_codec_fax.cpp
+++ b/core/fxcodec/codec/fx_codec_fax.cpp
@@ -447,7 +447,7 @@ void FaxGet1DLine(const uint8_t* src_buf,
 
 }  // namespace
 
-class CCodec_FaxDecoder : public CCodec_ScanlineDecoder {
+class CCodec_FaxDecoder final : public CCodec_ScanlineDecoder {
  public:
   CCodec_FaxDecoder(const uint8_t* src_buf,
                     uint32_t src_size,
diff --git a/core/fxcodec/codec/fx_codec_flate.cpp b/core/fxcodec/codec/fx_codec_flate.cpp
index 39d27a4955..11bdf67c42 100644
--- a/core/fxcodec/codec/fx_codec_flate.cpp
+++ b/core/fxcodec/codec/fx_codec_flate.cpp
@@ -623,7 +623,7 @@ uint32_t CCodec_FlateScanlineDecoder::GetSrcOffset() {
   return FlateGetPossiblyTruncatedTotalIn(m_pFlate.get());
 }
 
-class CCodec_FlatePredictorScanlineDecoder
+class CCodec_FlatePredictorScanlineDecoder final
     : public CCodec_FlateScanlineDecoder {
  public:
   CCodec_FlatePredictorScanlineDecoder(const uint8_t* src_buf,
diff --git a/core/fxcodec/codec/fx_codec_jpeg.cpp b/core/fxcodec/codec/fx_codec_jpeg.cpp
index 4c37465386..d8e94b0285 100644
--- a/core/fxcodec/codec/fx_codec_jpeg.cpp
+++ b/core/fxcodec/codec/fx_codec_jpeg.cpp
@@ -29,7 +29,7 @@ extern "C" {
 #endif
 }  // extern "C"
 
-class CJpegContext : public CCodec_JpegModule::Context {
+class CJpegContext final : public CCodec_JpegModule::Context {
  public:
   CJpegContext();
   ~CJpegContext() override;
@@ -162,7 +162,7 @@ static bool JpegLoadInfo(const uint8_t* src_buf,
   return true;
 }
 
-class CCodec_JpegDecoder : public CCodec_ScanlineDecoder {
+class CCodec_JpegDecoder final : public CCodec_ScanlineDecoder {
  public:
   CCodec_JpegDecoder();
   ~CCodec_JpegDecoder() override;