Standardize usage of virtual/override/final in components/

components/invalidation/fake_invalidation_state_tracker.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_INVALIDATION_FAKE_INVALIDATION_STATE_TRACKER_H_
 #define COMPONENTS_INVALIDATION_FAKE_INVALIDATION_STATE_TRACKER_H_
 
 #include "base/memory/weak_ptr.h"
 #include "components/invalidation/invalidation_state_tracker.h"
 
 namespace syncer {
 
 // InvalidationStateTracker implementation that simply keeps track of
 // the max versions and invalidation state in memory.
 class FakeInvalidationStateTracker
     : public InvalidationStateTracker,
       public base::SupportsWeakPtr<FakeInvalidationStateTracker> {
  public:
   FakeInvalidationStateTracker();
-  virtual ~FakeInvalidationStateTracker();
+  ~FakeInvalidationStateTracker() override;
 
   // InvalidationStateTracker implementation.
-  virtual void ClearAndSetNewClientId(const std::string& client_id) override;
-  virtual std::string GetInvalidatorClientId() const override;
-  virtual void SetBootstrapData(const std::string& data) override;
-  virtual std::string GetBootstrapData() const override;
-  virtual void SetSavedInvalidations(
-      const UnackedInvalidationsMap& states) override;
-  virtual UnackedInvalidationsMap GetSavedInvalidations() const override;
-  virtual void Clear() override;
+  void ClearAndSetNewClientId(const std::string& client_id) override;
+  std::string GetInvalidatorClientId() const override;
+  void SetBootstrapData(const std::string& data) override;
+  std::string GetBootstrapData() const override;
+  void SetSavedInvalidations(const UnackedInvalidationsMap& states) override;
+  UnackedInvalidationsMap GetSavedInvalidations() const override;
+  void Clear() override;
 
   static const int64 kMinVersion;
 
  private:
   std::string invalidator_client_id_;
   std::string bootstrap_data_;
   UnackedInvalidationsMap unacked_invalidations_map_;
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_INVALIDATION_FAKE_INVALIDATION_STATE_TRACKER_H_