Standardize usage of virtual/override/final in content/browser/

content/browser/dom_storage/session_storage_namespace_impl.h

Index: content/browser/dom_storage/session_storage_namespace_impl.h
diff --git a/content/browser/dom_storage/session_storage_namespace_impl.h b/content/browser/dom_storage/session_storage_namespace_impl.h
index cadb23924381e34c4e196a235724fb82185ee555..025ee8729dac06372c6c933bdb4e849001ba373b 100644
--- a/content/browser/dom_storage/session_storage_namespace_impl.h
+++ b/content/browser/dom_storage/session_storage_namespace_impl.h
@@ -40,26 +40,26 @@ class SessionStorageNamespaceImpl
       SessionStorageNamespaceImpl* master_session_storage_namespace);
 
   // SessionStorageNamespace implementation.
-  virtual int64 id() const override;
-  virtual const std::string& persistent_id() const override;
-  virtual void SetShouldPersist(bool should_persist) override;
-  virtual bool should_persist() const override;
+  int64 id() const override;
+  const std::string& persistent_id() const override;
+  void SetShouldPersist(bool should_persist) override;
+  bool should_persist() const override;
 
   SessionStorageNamespaceImpl* Clone();
   bool IsFromContext(DOMStorageContextWrapper* context);
 
-  virtual void AddTransactionLogProcessId(int process_id) override;
-  virtual void RemoveTransactionLogProcessId(int process_id) override;
-  virtual void Merge(bool actually_merge,
-                     int process_id,
-                     SessionStorageNamespace* other,
-                     const MergeResultCallback& callback) override;
-  virtual bool IsAliasOf(SessionStorageNamespace* other) override;
-  virtual SessionStorageNamespace* CreateAlias() override;
+  void AddTransactionLogProcessId(int process_id) override;
+  void RemoveTransactionLogProcessId(int process_id) override;
+  void Merge(bool actually_merge,
+             int process_id,
+             SessionStorageNamespace* other,
+             const MergeResultCallback& callback) override;
+  bool IsAliasOf(SessionStorageNamespace* other) override;
+  SessionStorageNamespace* CreateAlias() override;
 
  private:
   explicit SessionStorageNamespaceImpl(DOMStorageSession* clone);
-  virtual ~SessionStorageNamespaceImpl();
+  ~SessionStorageNamespaceImpl() override;
 
   scoped_refptr<DOMStorageSession> session_;