3 files changed, 3 insertions, 3 deletions
diff --git a/core/fxge/dib/cfx_bitmapcomposer.h b/core/fxge/dib/cfx_bitmapcomposer.h
index f1bf0e9f32..50a53dbc2b 100644
--- a/core/fxge/dib/cfx_bitmapcomposer.h
+++ b/core/fxge/dib/cfx_bitmapcomposer.h
@@ -18,7 +18,7 @@
 class CFX_ClipRgn;
 class CFX_DIBitmap;
 
-class CFX_BitmapComposer : public ScanlineComposerIface {
+class CFX_BitmapComposer final : public ScanlineComposerIface {
  public:
   CFX_BitmapComposer();
   ~CFX_BitmapComposer() override;
diff --git a/core/fxge/dib/cfx_bitmapstorer.h b/core/fxge/dib/cfx_bitmapstorer.h
index 7d3482fc3f..3da1f70487 100644
--- a/core/fxge/dib/cfx_bitmapstorer.h
+++ b/core/fxge/dib/cfx_bitmapstorer.h
@@ -16,7 +16,7 @@
 #include "core/fxge/dib/scanlinecomposer_iface.h"
 #include "third_party/base/stl_util.h"
 
-class CFX_BitmapStorer : public ScanlineComposerIface {
+class CFX_BitmapStorer final : public ScanlineComposerIface {
  public:
   CFX_BitmapStorer();
   ~CFX_BitmapStorer() override;
diff --git a/core/fxge/dib/cfx_imagetransformer.cpp b/core/fxge/dib/cfx_imagetransformer.cpp
index 0042462c89..66446ce52c 100644
--- a/core/fxge/dib/cfx_imagetransformer.cpp
+++ b/core/fxge/dib/cfx_imagetransformer.cpp
@@ -180,7 +180,7 @@ class CPDF_FixedMatrix {
   const int f;
 };
 
-class CFX_BilinearMatrix : public CPDF_FixedMatrix {
+class CFX_BilinearMatrix final : public CPDF_FixedMatrix {
  public:
   explicit CFX_BilinearMatrix(const CFX_Matrix& src) : CPDF_FixedMatrix(src) {}