Adding support to retrieve remaining and total space on disk/file shelf.

chrome/browser/chromeos/cros/mount_library.h

 // Copyright (c) 2011 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_CROS_MOUNT_LIBRARY_H_
 #define CHROME_BROWSER_CHROMEOS_CROS_MOUNT_LIBRARY_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 172 matching lines @@
   virtual const DiskMap& disks() const = 0;
   virtual const MountPointMap& mount_points() const = 0;
 
   virtual void RequestMountInfoRefresh() = 0;
   virtual void MountPath(const char* source_path,
                          MountType type,
                          const MountPathOptions& options) = 0;
   // |path| is device's mount path.
   virtual void UnmountPath(const char* path) = 0;
 
+  // Retrieves total and remaining available size on |mount_path|.
+  virtual void GetSizeStatsOnFileThread(const char* mount_path,
+                                        size_t* total_size_kb,
+                                        size_t* remaining_size_kb) = 0;
+
   // Formats device given its file path.
   // Example: file_path: /dev/sdb1
   virtual void FormatUnmountedDevice(const char* file_path) = 0;
 
   // Formats Device given its mount path. Unmount's the device
   // Example: mount_path: /media/VOLUME_LABEL
   virtual void FormatMountedDevice(const char* mount_path) = 0;
 
   // Unmounts device_poath and all of its known children.
   virtual void UnmountDeviceRecursive(const char* device_path,
       UnmountDeviceRecursiveCallbackType callback, void* user_data) = 0;
 
   // Helper functions for parameter conversions.
   static std::string MountTypeToString(MountType type);
   static MountType MountTypeFromString(const std::string& type_str);
   static std::string MountConditionToString(MountCondition type);
 
   // Used in testing. Enables mocking libcros.
   virtual void SetLibcrosProxy(MountLibcrosProxy* proxy) {}
 
   // Factory function, creates a new instance and returns ownership.
   // For normal usage, access the singleton via CrosLibrary::Get().
   static MountLibrary* GetImpl(bool stub);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_CROS_MOUNT_LIBRARY_H_