arc: Create intermediate directories in c/b/c/arc

chrome/browser/chromeos/arc/arc_downloads_watcher_service.h

-// Copyright 2016 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 CHROME_BROWSER_CHROMEOS_ARC_ARC_DOWNLOADS_WATCHER_SERVICE_H_
-#define CHROME_BROWSER_CHROMEOS_ARC_ARC_DOWNLOADS_WATCHER_SERVICE_H_
-
-#include <memory>
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "components/arc/arc_service.h"
-#include "components/arc/common/file_system.mojom.h"
-#include "components/arc/instance_holder.h"
-#include "mojo/public/cpp/bindings/array.h"
-#include "mojo/public/cpp/bindings/string.h"
-
-namespace base {
-class FilePath;
-}  // namespace base
-
-namespace arc {
-
-class ArcBridgeService;
-
-// Returns true if the file path has a media extension supported by Android.
-bool HasAndroidSupportedMediaExtension(const base::FilePath& path);
-
-// Watches Downloads directory and registers newly created media files to
-// Android MediaProvider.
-class ArcDownloadsWatcherService
-    : public ArcService,
-      public InstanceHolder<mojom::FileSystemInstance>::Observer {
- public:
-  explicit ArcDownloadsWatcherService(ArcBridgeService* bridge_service);
-  ~ArcDownloadsWatcherService() override;
-
-  // InstanceHolder<mojom::FileSystemInstance>::Observer
-  void OnInstanceReady() override;
-  void OnInstanceClosed() override;
-
- private:
-  class DownloadsWatcher;
-
-  void StartWatchingDownloads();
-  void StopWatchingDownloads();
-
-  void OnDownloadsChanged(mojo::Array<mojo::String> paths);
-
-  std::unique_ptr<DownloadsWatcher> watcher_;
-
-  // Note: This should remain the last member so it'll be destroyed and
-  // invalidate the weak pointers before any other members are destroyed.
-  base::WeakPtrFactory<ArcDownloadsWatcherService> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(ArcDownloadsWatcherService);
-};
-
-}  // namespace arc
-
-#endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_DOWNLOADS_WATCHER_SERVICE_H_