Preserve the hardware read-only flag in Disk object.

chrome/browser/chromeos/extensions/file_manager/device_event_router_unittest.cc

 // Copyright 2014 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/extensions/file_manager/device_event_router.h"
 
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 53 matching lines @@
  protected:
   void SetUp() override {
     device_event_router.reset(new DeviceEventRouterImpl());
   }
 
   // Creates a disk instance with |device_path| and |mount_path| for testing.
   Disk CreateTestDisk(const std::string& device_path,
                       const std::string& mount_path) {
     return Disk(device_path,
                 mount_path,
+                false,
                 "",
                 "",
                 "",
                 "",
                 "",
                 "",
                 "",
                 "",
                 "",
                 device_path,
@@ skipping 46 matching lines @@
   ASSERT_EQ(2u, device_event_router->events.size());
   EXPECT_EQ(file_manager_private::DEVICE_EVENT_TYPE_HARD_UNPLUGGED,
             device_event_router->events[0].type);
   EXPECT_EQ("/device/test", device_event_router->events[0].device_path);
   EXPECT_EQ(file_manager_private::DEVICE_EVENT_TYPE_REMOVED,
             device_event_router->events[1].type);
   EXPECT_EQ("/device/test", device_event_router->events[1].device_path);
 }
 
 }  // namespace file_manager