Clean up ARC file system unit tests.

components/arc/file_system/arc_file_system_operation_runner.h

-// Copyright 2017 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_ARC_FILE_SYSTEM_ARC_FILE_SYSTEM_OPERATION_RUNNER_H_
-#define COMPONENTS_ARC_FILE_SYSTEM_ARC_FILE_SYSTEM_OPERATION_RUNNER_H_
-
-#include <string>
-
-#include "components/arc/arc_service.h"
-#include "components/arc/common/file_system.mojom.h"
-
-class GURL;
-
-namespace arc {
-
-// An interface to run ARC file system operations.
-//
-// This is an abstraction layer on top of mojom::FileSystemInstance.
-// In production, ArcDeferredFileSystemOperationRunner is always used which
-// defers file system operations while ARC is booting.
-// In unit tests, fake implementations will be injected.
-//
-// All member functions must be called on the UI thread.
-class ArcFileSystemOperationRunner : public ArcService {
- public:
-  // For supporting ArcServiceManager::GetService<T>().
-  static const char kArcServiceName[];
-
-  explicit ArcFileSystemOperationRunner(ArcBridgeService* bridge_service);
-  ~ArcFileSystemOperationRunner() override;
-
-  using GetFileSizeCallback = mojom::FileSystemInstance::GetFileSizeCallback;
-  using OpenFileToReadCallback =
-      mojom::FileSystemInstance::OpenFileToReadCallback;
-  using GetDocumentCallback = mojom::FileSystemInstance::GetDocumentCallback;
-  using GetChildDocumentsCallback =
-      mojom::FileSystemInstance::GetChildDocumentsCallback;
-
-  // Runs file system operations. See file_system.mojom for documentation.
-  virtual void GetFileSize(const GURL& url,
-                           const GetFileSizeCallback& callback) = 0;
-  virtual void OpenFileToRead(const GURL& url,
-                              const OpenFileToReadCallback& callback) = 0;
-  virtual void GetDocument(const std::string& authority,
-                           const std::string& document_id,
-                           const GetDocumentCallback& callback) = 0;
-  virtual void GetChildDocuments(const std::string& authority,
-                                 const std::string& parent_document_id,
-                                 const GetChildDocumentsCallback& callback) = 0;
-};
-
-}  // namespace arc
-
-#endif  // COMPONENTS_ARC_FILE_SYSTEM_ARC_FILE_SYSTEM_OPERATION_RUNNER_H_