Standardize usage of virtual/override/final in chrome/browser/media_galleries

chrome/browser/media_galleries/fileapi/av_scanning_file_validator.h

Index: chrome/browser/media_galleries/fileapi/av_scanning_file_validator.h
diff --git a/chrome/browser/media_galleries/fileapi/av_scanning_file_validator.h b/chrome/browser/media_galleries/fileapi/av_scanning_file_validator.h
index 6144550c79af659aa1b43c38250e2451d3a01dea..262aac7adf01af56b38c1eb2d0432b9d640035b0 100644
--- a/chrome/browser/media_galleries/fileapi/av_scanning_file_validator.h
+++ b/chrome/browser/media_galleries/fileapi/av_scanning_file_validator.h
@@ -15,13 +15,12 @@ class FilePath;
 // This class supports AV scanning on post write validation.
 class AVScanningFileValidator : public storage::CopyOrMoveFileValidator {
  public:
-  virtual ~AVScanningFileValidator();
+  ~AVScanningFileValidator() override;
 
   // Runs AV checks on the resulting file (Windows-only).
   // Subclasses will not typically override this method.
-  virtual void StartPostWriteValidation(
-      const base::FilePath& dest_platform_path,
-      const ResultCallback& result_callback) override;
+  void StartPostWriteValidation(const base::FilePath& dest_platform_path,
+                                const ResultCallback& result_callback) override;
 
  protected:
   AVScanningFileValidator();