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

chrome/browser/sync/test/integration/sync_exponential_backoff_test.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/test/integration/bookmarks_helper.h"
 #include "chrome/browser/sync/test/integration/retry_verifier.h"
 #include "chrome/browser/sync/test/integration/single_client_status_change_checker.h"
@@ skipping 19 matching lines @@
 // Helper class that checks if a sync client has successfully gone through
 // exponential backoff after it encounters an error.
 class ExponentialBackoffChecker : public SingleClientStatusChangeChecker {
  public:
   explicit ExponentialBackoffChecker(ProfileSyncService* pss)
         : SingleClientStatusChangeChecker(pss) {
     const SyncSessionSnapshot& snap = service()->GetLastSessionSnapshot();
     retry_verifier_.Initialize(snap);
   }
 
-  virtual ~ExponentialBackoffChecker() {}
+  ~ExponentialBackoffChecker() override {}
 
   // Checks if backoff is complete. Called repeatedly each time PSS notifies
   // observers of a state change.
-  virtual bool IsExitConditionSatisfied() override {
+  bool IsExitConditionSatisfied() override {
     const SyncSessionSnapshot& snap = service()->GetLastSessionSnapshot();
     retry_verifier_.VerifyRetryInterval(snap);
     return (retry_verifier_.done() && retry_verifier_.Succeeded());
   }
 
-  virtual std::string GetDebugMessage() const override {
+  std::string GetDebugMessage() const override {
     return base::StringPrintf("Verifying backoff intervals (%d/%d)",
                               retry_verifier_.retry_count(),
                               RetryVerifier::kMaxRetry);
   }
 
  private:
   // Keeps track of the number of attempts at exponential backoff and its
   // related bookkeeping information for verification.
   RetryVerifier retry_verifier_;
 
@@ skipping 40 matching lines @@
 
   // Verify that the client goes into exponential backoff while it is unable to
   // reach the sync server.
   ExponentialBackoffChecker exponential_backoff_checker(
       GetSyncService((0)));
   exponential_backoff_checker.Wait();
   ASSERT_FALSE(exponential_backoff_checker.TimedOut());
 }
 
 }  // namespace