Standardize usage of virtual/override/final in content/

content/public/test/test_file_system_backend.h

Index: content/public/test/test_file_system_backend.h
diff --git a/content/public/test/test_file_system_backend.h b/content/public/test/test_file_system_backend.h
index dbb994278b91c415eac07bf5bb9bca3e49fb4a67..d1cc94cd99a42abc3a76d088f926b09ac763aaa9 100644
--- a/content/public/test/test_file_system_backend.h
+++ b/content/public/test/test_file_system_backend.h
@@ -31,45 +31,44 @@ class TestFileSystemBackend : public storage::FileSystemBackend {
   TestFileSystemBackend(
       base::SequencedTaskRunner* task_runner,
       const base::FilePath& base_path);
-  virtual ~TestFileSystemBackend();
+  ~TestFileSystemBackend() override;
 
   // FileSystemBackend implementation.
-  virtual bool CanHandleType(storage::FileSystemType type) const override;
-  virtual void Initialize(storage::FileSystemContext* context) override;
-  virtual void ResolveURL(const storage::FileSystemURL& url,
-                          storage::OpenFileSystemMode mode,
-                          const OpenFileSystemCallback& callback) override;
-  virtual storage::AsyncFileUtil* GetAsyncFileUtil(
+  bool CanHandleType(storage::FileSystemType type) const override;
+  void Initialize(storage::FileSystemContext* context) override;
+  void ResolveURL(const storage::FileSystemURL& url,
+                  storage::OpenFileSystemMode mode,
+                  const OpenFileSystemCallback& callback) override;
+  storage::AsyncFileUtil* GetAsyncFileUtil(
       storage::FileSystemType type) override;
-  virtual storage::WatcherManager* GetWatcherManager(
+  storage::WatcherManager* GetWatcherManager(
       storage::FileSystemType type) override;
-  virtual storage::CopyOrMoveFileValidatorFactory*
-      GetCopyOrMoveFileValidatorFactory(storage::FileSystemType type,
-                                        base::File::Error* error_code) override;
-  virtual storage::FileSystemOperation* CreateFileSystemOperation(
+  storage::CopyOrMoveFileValidatorFactory* GetCopyOrMoveFileValidatorFactory(
+      storage::FileSystemType type,
+      base::File::Error* error_code) override;
+  storage::FileSystemOperation* CreateFileSystemOperation(
       const storage::FileSystemURL& url,
       storage::FileSystemContext* context,
       base::File::Error* error_code) const override;
-  virtual bool SupportsStreaming(
-      const storage::FileSystemURL& url) const override;
-  virtual bool HasInplaceCopyImplementation(
+  bool SupportsStreaming(const storage::FileSystemURL& url) const override;
+  bool HasInplaceCopyImplementation(
       storage::FileSystemType type) const override;
-  virtual scoped_ptr<storage::FileStreamReader> CreateFileStreamReader(
+  scoped_ptr<storage::FileStreamReader> CreateFileStreamReader(
       const storage::FileSystemURL& url,
       int64 offset,
       int64 max_bytes_to_read,
       const base::Time& expected_modification_time,
       storage::FileSystemContext* context) const override;
-  virtual scoped_ptr<storage::FileStreamWriter> CreateFileStreamWriter(
+  scoped_ptr<storage::FileStreamWriter> CreateFileStreamWriter(
       const storage::FileSystemURL& url,
       int64 offset,
       storage::FileSystemContext* context) const override;
-  virtual storage::FileSystemQuotaUtil* GetQuotaUtil() override;
-  virtual const storage::UpdateObserverList* GetUpdateObservers(
+  storage::FileSystemQuotaUtil* GetQuotaUtil() override;
+  const storage::UpdateObserverList* GetUpdateObservers(
       storage::FileSystemType type) const override;
-  virtual const storage::ChangeObserverList* GetChangeObservers(
+  const storage::ChangeObserverList* GetChangeObservers(
       storage::FileSystemType type) const override;
-  virtual const storage::AccessObserverList* GetAccessObservers(
+  const storage::AccessObserverList* GetAccessObservers(
       storage::FileSystemType type) const override;
 
   // Initialize the CopyOrMoveFileValidatorFactory. Invalid to call more than