Add a method in DiskMountManager to refresh mount entries in addition to devices.

chrome/browser/chromeos/imageburner/burn_device_handler_unittest.cc

 // Copyright (c) 2013 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.
 
 #include "chrome/browser/chromeos/imageburner/burn_device_handler.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
@@ skipping 62 matching lines @@
 
   // Following methods are not implemented.
   virtual const Disk* FindDiskBySourcePath(
       const std::string& source_path) const OVERRIDE {
     return NULL;
   }
   virtual const MountPointMap& mount_points() const OVERRIDE {
     // Note: mount_points_ will always be empty, now.
     return mount_points_;
   }
-  virtual void RequestMountInfoRefresh() OVERRIDE {}
+  virtual void EnsureMountInfoRefreshed(
+      const EnsureMountInfoRefreshedCallback& callback) OVERRIDE {}
   virtual void MountPath(const std::string& source_path,
                          const std::string& source_format,
                          const std::string& mount_label,
                          MountType type) OVERRIDE {}
   virtual void UnmountPath(const std::string& mount_path,
                            UnmountOptions options,
                            const UnmountPathCallback& callback) OVERRIDE {}
   virtual void FormatMountedDevice(const std::string& mount_path) OVERRIDE {}
   virtual void UnmountDeviceRecursively(
       const std::string& device_path,
@@ skipping 181 matching lines @@
 
   added_device.clear();
   removed_device.clear();
   disk_mount_manager_->EmulateRemoveDisk("/dev/unburnable");
   EXPECT_TRUE(added_device.empty());
   EXPECT_TRUE(removed_device.empty());
 }
 
 }  // namespace imageburner
 }  // namespace chromeos