3 files changed, 3 insertions, 3 deletions
diff --git a/core/fpdfapi/edit/cpdf_creator.cpp b/core/fpdfapi/edit/cpdf_creator.cpp
index 11b0628b01..7af62806da 100644
--- a/core/fpdfapi/edit/cpdf_creator.cpp
+++ b/core/fpdfapi/edit/cpdf_creator.cpp
@@ -28,7 +28,7 @@ namespace {
 
 const size_t kArchiveBufferSize = 32768;
 
-class CFX_FileBufferArchive : public IFX_ArchiveStream {
+class CFX_FileBufferArchive final : public IFX_ArchiveStream {
  public:
   explicit CFX_FileBufferArchive(const RetainPtr<IFX_WriteStream>& archive);
   ~CFX_FileBufferArchive() override;
diff --git a/core/fpdfapi/edit/cpdf_creator_embeddertest.cpp b/core/fpdfapi/edit/cpdf_creator_embeddertest.cpp
index 2d431b8424..1f8f788d34 100644
--- a/core/fpdfapi/edit/cpdf_creator_embeddertest.cpp
+++ b/core/fpdfapi/edit/cpdf_creator_embeddertest.cpp
@@ -20,7 +20,7 @@
 
 namespace {
 
-class FileAccess : public FPDF_FILEACCESS {
+class FileAccess final : public FPDF_FILEACCESS {
  public:
   explicit FileAccess(const std::string& file_name) {
     std::string file_path;
diff --git a/core/fpdfapi/edit/cpdf_stringarchivestream.h b/core/fpdfapi/edit/cpdf_stringarchivestream.h
index bb5481e376..aa744a9ea1 100644
--- a/core/fpdfapi/edit/cpdf_stringarchivestream.h
+++ b/core/fpdfapi/edit/cpdf_stringarchivestream.h
@@ -7,7 +7,7 @@
 
 #include "core/fxcrt/fx_stream.h"
 
-class CPDF_StringArchiveStream : public IFX_ArchiveStream {
+class CPDF_StringArchiveStream final : public IFX_ArchiveStream {
  public:
   explicit CPDF_StringArchiveStream(std::ostringstream* stream);
   ~CPDF_StringArchiveStream() override;