Media Galleries Partial Deprecation: Remove scan functionality.

chrome/browser/media_galleries/media_folder_finder.h

-// Copyright 2014 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_MEDIA_GALLERIES_MEDIA_FOLDER_FINDER_H_
-#define CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_FOLDER_FINDER_H_
-
-#include <map>
-#include <vector>
-
-#include "base/callback.h"
-#include "base/files/file_path.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "base/sequenced_task_runner.h"
-#include "chrome/browser/media_galleries/media_scan_types.h"
-
-// MediaFolderFinder scans local hard drives and look for folders that contain
-// media files.
-class MediaFolderFinder {
- public:
-  // Key: path to a folder
-  // Value: scan results for that folder, non-recursive.
-  typedef std::map<base::FilePath, MediaGalleryScanResult>
-      MediaFolderFinderResults;
-
-  // |results| never contains entries for |graylisted_folders_| or parent
-  // directories of |graylisted_folders_|.
-  typedef base::Callback<void(bool /*success*/,
-                              const MediaFolderFinderResults& /*results*/)>
-      MediaFolderFinderResultsCallback;
-
-  // |callback| will get called when the scan finishes. If the object is deleted
-  // before it finishes, the scan will stop and |callback| will get called with
-  // success = false.
-  // MediaFolderFinder has a default set of per-platform paths to scan.
-  // Override in tests with SetRootsForTesting().
-  explicit MediaFolderFinder(const MediaFolderFinderResultsCallback& callback);
-  virtual ~MediaFolderFinder();
-
-  // Start the scan.
-  virtual void StartScan();
-
-  const std::vector<base::FilePath>& graylisted_folders() const;
-
- private:
-  friend class MediaFolderFinderTest;
-  friend class MediaGalleriesPlatformAppBrowserTest;
-
-  class Worker;
-  struct WorkerReply {
-    WorkerReply();
-    WorkerReply(const WorkerReply& other);
-    ~WorkerReply();
-
-    MediaGalleryScanResult scan_result;
-    std::vector<base::FilePath> new_folders;
-  };
-
-  enum ScanState {
-    SCAN_STATE_NOT_STARTED,
-    SCAN_STATE_STARTED,
-    SCAN_STATE_FINISHED,
-  };
-
-  void SetRootsForTesting(const std::vector<base::FilePath>& roots);
-
-  void OnInitialized(const std::vector<base::FilePath>& roots);
-
-  // Scan a folder from |folders_to_scan_|.
-  void ScanFolder();
-
-  // Callback that handles the |reply| from |worker_| for a scanned |path|.
-  void GotScanResults(const base::FilePath& path, const WorkerReply& reply);
-
-  const MediaFolderFinderResultsCallback results_callback_;
-  MediaFolderFinderResults results_;
-
-  std::vector<base::FilePath> graylisted_folders_;
-  std::vector<base::FilePath> folders_to_scan_;
-  ScanState scan_state_;
-
-  scoped_refptr<base::SequencedTaskRunner> worker_task_runner_;
-
-  // Owned by MediaFolderFinder, but lives on |worker_task_runner_|.
-  Worker* worker_;
-
-  // Set of roots to scan for testing.
-  bool has_roots_for_testing_;
-  std::vector<base::FilePath> roots_for_testing_;
-
-  base::WeakPtrFactory<MediaFolderFinder> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(MediaFolderFinder);
-};
-
-#endif  // CHROME_BROWSER_MEDIA_GALLERIES_MEDIA_FOLDER_FINDER_H_