Evict drive cache with file download from website if necessary.

chrome/browser/chromeos/drive/download_handler.h

 // Copyright (c) 2012 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_DRIVE_DOWNLOAD_HANDLER_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_DOWNLOAD_HANDLER_H_
 
 #include "base/callback_forward.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/download/all_download_item_notifier.h"
@@ skipping 55 matching lines @@
   base::FilePath GetCacheFilePath(const content::DownloadItem* download);
 
   // Checks if there is a Drive upload associated with |download|
   bool IsDriveDownload(const content::DownloadItem* download);
 
   // Checks a file corresponding to the download item exists in Drive.
   void CheckForFileExistence(
       const content::DownloadItem* download,
       const content::CheckForFileExistenceCallback& callback);
 
+  // Calculates request space for |downloads|.
+  int64 CalculateRequestSpace(
+      const content::DownloadManager::DownloadVector& downloads);
+
+  // Checks available storage space and free disk space if necessary. Actual
+  // execution is delayed and rate limited.
+  void FreeDiskSpaceIfNeeded();
+
+  // Checks available storage space and free disk space if necessary. This is
+  // executed immediately.
+  void FreeDiskSpaceIfNeededImmediately();
+
+  // Sets free disk space delay for testing.
+  void SetFreeDiskSpaceDelayForTesting(const base::TimeDelta& delay);
+
  private:
   // AllDownloadItemNotifier::Observer overrides:
   void OnDownloadCreated(content::DownloadManager* manager,
                          content::DownloadItem* download) override;
   void OnDownloadUpdated(content::DownloadManager* manager,
                          content::DownloadItem* download) override;
 
   // Removes the download.
   void RemoveDownload(void* manager_id, int id);
 
@@ skipping 11 matching lines @@
                         int id,
                         const base::FilePath* cache_file_path,
                         FileError error);
 
   // Gets a download manager, given a |manager_id| casted from the pointer to
   // the manager. This is used to validate the manager that may be deleted while
   // asynchronous task posting. Returns NULL if the manager is already gone.
   content::DownloadManager* GetDownloadManager(void* manager_id);
 
   FileSystemInterface* file_system_;  // Owned by DriveIntegrationService.
+
   // Observe the DownloadManager for new downloads.
   scoped_ptr<AllDownloadItemNotifier> notifier_;
   scoped_ptr<AllDownloadItemNotifier> notifier_incognito_;
 
   // Temporary download location directory.
   base::FilePath drive_tmp_download_path_;
 
+  // True if there is pending FreeDiskSpaceIfNeeded call.
+  bool has_pending_free_disk_space_;
+
+  base::TimeDelta free_disk_space_delay_;
+
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<DownloadHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadHandler);
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DOWNLOAD_HANDLER_H_