Standardize usage of virtual/override/final in sync/

sync/test/fake_sync_encryption_handler.h

Index: sync/test/fake_sync_encryption_handler.h
diff --git a/sync/test/fake_sync_encryption_handler.h b/sync/test/fake_sync_encryption_handler.h
index df4c77041e144b31ced0cd28dbdcd1d146bde824..c3180a684dd4d13796e017430d15eb597d173d18 100644
--- a/sync/test/fake_sync_encryption_handler.h
+++ b/sync/test/fake_sync_encryption_handler.h
@@ -26,32 +26,30 @@ class FakeSyncEncryptionHandler : public SyncEncryptionHandler,
                                   public syncable::NigoriHandler {
  public:
   FakeSyncEncryptionHandler();
-  virtual ~FakeSyncEncryptionHandler();
+  ~FakeSyncEncryptionHandler() override;
 
   // SyncEncryptionHandler implementation.
-  virtual void AddObserver(Observer* observer) override;
-  virtual void RemoveObserver(Observer* observer) override;
-  virtual void Init() override;
-  virtual void SetEncryptionPassphrase(const std::string& passphrase,
-                                       bool is_explicit) override;
-  virtual void SetDecryptionPassphrase(const std::string& passphrase) override;
-  virtual void EnableEncryptEverything() override;
-  virtual bool EncryptEverythingEnabled() const override;
-  virtual PassphraseType GetPassphraseType() const override;
+  void AddObserver(Observer* observer) override;
+  void RemoveObserver(Observer* observer) override;
+  void Init() override;
+  void SetEncryptionPassphrase(const std::string& passphrase,
+                               bool is_explicit) override;
+  void SetDecryptionPassphrase(const std::string& passphrase) override;
+  void EnableEncryptEverything() override;
+  bool EncryptEverythingEnabled() const override;
+  PassphraseType GetPassphraseType() const override;
 
   // NigoriHandler implemenation.
-  virtual void ApplyNigoriUpdate(
-      const sync_pb::NigoriSpecifics& nigori,
-      syncable::BaseTransaction* const trans) override;
-  virtual void UpdateNigoriFromEncryptedTypes(
+  void ApplyNigoriUpdate(const sync_pb::NigoriSpecifics& nigori,
+                         syncable::BaseTransaction* const trans) override;
+  void UpdateNigoriFromEncryptedTypes(
       sync_pb::NigoriSpecifics* nigori,
       syncable::BaseTransaction* const trans) const override;
-  virtual bool NeedKeystoreKey(
-      syncable::BaseTransaction* const trans) const override;
-  virtual bool SetKeystoreKeys(
+  bool NeedKeystoreKey(syncable::BaseTransaction* const trans) const override;
+  bool SetKeystoreKeys(
       const google::protobuf::RepeatedPtrField<google::protobuf::string>& keys,
       syncable::BaseTransaction* const trans) override;
-  virtual ModelTypeSet GetEncryptedTypes(
+  ModelTypeSet GetEncryptedTypes(
       syncable::BaseTransaction* const trans) const override;
 
   Cryptographer* cryptographer() { return &cryptographer_; }