gdata: Support mouting archive file in GData cache

chrome/browser/chromeos/disks/disk_mount_manager.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_DISKS_DISK_MOUNT_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_DISKS_DISK_MOUNT_MANAGER_H_
 #pragma once
 
 #include <map>
 
@@ skipping 183 matching lines @@
   // Gets the list of disks found.
   virtual const DiskMap& disks() const = 0;
 
   // Gets the list of mount points.
   virtual const MountPointMap& mount_points() const = 0;
 
   // Requests refreshing all the information about mounted disks.
   virtual void RequestMountInfoRefresh() = 0;
 
   // Mounts a device.
-  virtual void MountPath(const std::string& source_path, MountType type) = 0;
+  virtual void MountPath(const std::string& source_path,
+                         const std::string& source_format,
+                         MountType type) = 0;
 
   // Unmounts a mounted disk.
   virtual void UnmountPath(const std::string& mount_path) = 0;
 
   // Retrieves total and remaining available size on |mount_path|.
   virtual void GetSizeStatsOnFileThread(const std::string& mount_path,
                                         size_t* total_size_kb,
                                         size_t* remaining_size_kb) = 0;
   // Formats device given its file path.
   // Example: file_path: /dev/sdb1
@@ skipping 35 matching lines @@
 
   // Returns a pointer to the global DiskMountManager instance.
   // Initialize() should already have been called.
   static DiskMountManager* GetInstance();
 };
 
 }  // namespace disks
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_DISKS_DISK_MOUNT_MANAGER_H_