Standardize usage of virtual/override/final in components/

components/proximity_auth/cryptauth/cryptauth_api_call_flow_unittest.cc

Index: components/proximity_auth/cryptauth/cryptauth_api_call_flow_unittest.cc
diff --git a/components/proximity_auth/cryptauth/cryptauth_api_call_flow_unittest.cc b/components/proximity_auth/cryptauth/cryptauth_api_call_flow_unittest.cc
index 8888c65aa2941addcecc77c392d5c5709f1b57f4..89ebe7f556d3f58d0e93955dfea3ed71f5040c93 100644
--- a/components/proximity_auth/cryptauth/cryptauth_api_call_flow_unittest.cc
+++ b/components/proximity_auth/cryptauth/cryptauth_api_call_flow_unittest.cc
@@ -86,13 +86,13 @@ class ProximityAuthCryptAuthApiCallFlowTest
   }
 
   // net::TestURLFetcherDelegateForTests overrides.
-  virtual void OnRequestStart(int fetcher_id) override {
+  void OnRequestStart(int fetcher_id) override {
     url_fetcher_ = url_fetcher_factory_->GetFetcherByID(fetcher_id);
   }
 
-  virtual void OnChunkUpload(int fetcher_id) override {}
+  void OnChunkUpload(int fetcher_id) override {}
 
-  virtual void OnRequestEnd(int fetcher_id) override {}
+  void OnRequestEnd(int fetcher_id) override {}
 
   net::TestURLFetcher* url_fetcher_;
   scoped_ptr<std::string> result_;