Storage manager: Show the disk usage of other users.

chromeos/dbus/cryptohome_client.h

Index: chromeos/dbus/cryptohome_client.h
diff --git a/chromeos/dbus/cryptohome_client.h b/chromeos/dbus/cryptohome_client.h
index cc0fd7025da37aa4e2bafa1f74580a201d27f9be..8fc61f94b0e4f64241a565479d13f9aad0ed5e41 100644
--- a/chromeos/dbus/cryptohome_client.h
+++ b/chromeos/dbus/cryptohome_client.h
@@ -152,6 +152,11 @@ class CHROMEOS_EXPORT CryptohomeClient : public DBusClient {
       const cryptohome::Identification& cryptohome_id_to,
       const ProtobufMethodCallback& callback) = 0;
 
+  // Calls GetAccountDiskUsage method. |callback| is called after the method
+  // call succeeds
+  virtual void GetAccountDiskUsage(const cryptohome::Identification& account_id,
+                                   const ProtobufMethodCallback& callback) = 0;
+
   // Calls GetSystemSalt method.  |callback| is called after the method call
   // succeeds.
   virtual void GetSystemSalt(const GetSystemSaltCallback& callback) = 0;