Standardize usage of virtual/override/final in storage/

storage/browser/fileapi/file_system_quota_client.h

Index: storage/browser/fileapi/file_system_quota_client.h
diff --git a/storage/browser/fileapi/file_system_quota_client.h b/storage/browser/fileapi/file_system_quota_client.h
index f8dab3dec507813f127a7a898905be4bc24c63b2..869e63eefefbec10390bdb4a1fd246d70c475904 100644
--- a/storage/browser/fileapi/file_system_quota_client.h
+++ b/storage/browser/fileapi/file_system_quota_client.h
@@ -37,23 +37,23 @@ class STORAGE_EXPORT_PRIVATE FileSystemQuotaClient
   FileSystemQuotaClient(
       FileSystemContext* file_system_context,
       bool is_incognito);
-  virtual ~FileSystemQuotaClient();
+  ~FileSystemQuotaClient() override;
 
   // QuotaClient methods.
-  virtual storage::QuotaClient::ID id() const override;
-  virtual void OnQuotaManagerDestroyed() override;
-  virtual void GetOriginUsage(const GURL& origin_url,
-                              storage::StorageType type,
-                              const GetUsageCallback& callback) override;
-  virtual void GetOriginsForType(storage::StorageType type,
-                                 const GetOriginsCallback& callback) override;
-  virtual void GetOriginsForHost(storage::StorageType type,
-                                 const std::string& host,
-                                 const GetOriginsCallback& callback) override;
-  virtual void DeleteOriginData(const GURL& origin,
-                                storage::StorageType type,
-                                const DeletionCallback& callback) override;
-  virtual bool DoesSupport(storage::StorageType type) const override;
+  storage::QuotaClient::ID id() const override;
+  void OnQuotaManagerDestroyed() override;
+  void GetOriginUsage(const GURL& origin_url,
+                      storage::StorageType type,
+                      const GetUsageCallback& callback) override;
+  void GetOriginsForType(storage::StorageType type,
+                         const GetOriginsCallback& callback) override;
+  void GetOriginsForHost(storage::StorageType type,
+                         const std::string& host,
+                         const GetOriginsCallback& callback) override;
+  void DeleteOriginData(const GURL& origin,
+                        storage::StorageType type,
+                        const DeletionCallback& callback) override;
+  bool DoesSupport(storage::StorageType type) const override;
 
  private:
   base::SequencedTaskRunner* file_task_runner() const;