Propagate the read_only_hardware flag of volumes to js.

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

 // Copyright 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/extensions/file_manager/private_api_util.h"
 
 #include <stddef.h>
 #include <string>
 #include <utility>
 
@@ skipping 178 matching lines @@
     volume_metadata->source_path.reset(
         new std::string(volume.source_path().AsUTF8Unsafe()));
   }
 
   switch (volume.source()) {
     case SOURCE_FILE:
       volume_metadata->source = file_manager_private::SOURCE_FILE;
       break;
     case SOURCE_DEVICE:
       volume_metadata->source = file_manager_private::SOURCE_DEVICE;
+      volume_metadata->is_read_only_removable_device = volume
+          .is_read_only_removable_device();
       break;
     case SOURCE_NETWORK:
       volume_metadata->source =
           extensions::api::file_manager_private::SOURCE_NETWORK;
       break;
     case SOURCE_SYSTEM:
       volume_metadata->source =
           extensions::api::file_manager_private::SOURCE_SYSTEM;
       break;
   }
@@ skipping 159 matching lines @@
 }
 
 drive::EventLogger* GetLogger(Profile* profile) {
   drive::DriveIntegrationService* service =
       drive::DriveIntegrationServiceFactory::FindForProfile(profile);
   return service ? service->event_logger() : NULL;
 }
 
 }  // namespace util
 }  // namespace file_manager