Use exactly one of final, override, and virtual

minidump/minidump_exception_writer.h

Index: minidump/minidump_exception_writer.h
diff --git a/minidump/minidump_exception_writer.h b/minidump/minidump_exception_writer.h
index b18eefa4efea5859d1102d395328555444f19673..dc4ad6ce12d49508891843d6a719e0247deab3fe 100644
--- a/minidump/minidump_exception_writer.h
+++ b/minidump/minidump_exception_writer.h
@@ -86,13 +86,13 @@ class MinidumpExceptionWriter final : public internal::MinidumpStreamWriter {
 
  protected:
   // MinidumpWritable:
-  virtual bool Freeze() override;
-  virtual size_t SizeOfObject() override;
-  virtual std::vector<MinidumpWritable*> Children() override;
-  virtual bool WriteObject(FileWriterInterface* file_writer) override;
+  bool Freeze() override;
+  size_t SizeOfObject() override;
+  std::vector<MinidumpWritable*> Children() override;
+  bool WriteObject(FileWriterInterface* file_writer) override;
 
   // MinidumpStreamWriter:
-  virtual MinidumpStreamType StreamType() const override;
+  MinidumpStreamType StreamType() const override;
 
  private:
   MINIDUMP_EXCEPTION_STREAM exception_;