Standardize usage of virtual/override/final in components/

components/rappor/log_uploader.h

Index: components/rappor/log_uploader.h
diff --git a/components/rappor/log_uploader.h b/components/rappor/log_uploader.h
index 18661b5ce586a22e131076e90e926f670824b47e..f6219bb11c89fcf6268ec548794616e013d65841 100644
--- a/components/rappor/log_uploader.h
+++ b/components/rappor/log_uploader.h
@@ -39,7 +39,7 @@ class LogUploader : public net::URLFetcherDelegate {
 
   // If the object is destroyed (or the program terminates) while logs are
   // queued, the logs are lost.
-  virtual ~LogUploader();
+  ~LogUploader() override;
 
   // Adds an entry to the queue of logs to be uploaded to the server.  The
   // uploader makes no assumptions about the format of |log| and simply sends
@@ -64,7 +64,7 @@ class LogUploader : public net::URLFetcherDelegate {
  private:
   // Implements net::URLFetcherDelegate. Called after transmission completes
   // (whether successful or not).
-  virtual void OnURLFetchComplete(const net::URLFetcher* source) override;
+  void OnURLFetchComplete(const net::URLFetcher* source) override;
 
   // Called when the upload is completed.
   void OnUploadFinished(bool server_is_healthy, bool more_logs_remaining);