Remove base::StringValue

extensions/browser/api/system_storage/system_storage_api.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 "extensions/browser/api/system_storage/system_storage_api.h"
 
 #include "base/memory/ptr_util.h"
 
 using storage_monitor::StorageMonitor;
 
@@ skipping 71 matching lines @@
     case StorageMonitor::EJECT_IN_USE:
       result = api::system_storage::EJECT_DEVICE_RESULT_CODE_IN_USE;
       break;
     case StorageMonitor::EJECT_NO_SUCH_DEVICE:
       result = api::system_storage::EJECT_DEVICE_RESULT_CODE_NO_SUCH_DEVICE;
       break;
     case StorageMonitor::EJECT_FAILURE:
       result = api::system_storage::EJECT_DEVICE_RESULT_CODE_FAILURE;
   }
 
-  Respond(OneArgument(base::MakeUnique<base::StringValue>(
-      api::system_storage::ToString(result))));
+  Respond(OneArgument(
+      base::MakeUnique<base::Value>(api::system_storage::ToString(result))));
 }
 
 SystemStorageGetAvailableCapacityFunction::
     SystemStorageGetAvailableCapacityFunction() {
 }
 
 SystemStorageGetAvailableCapacityFunction::
     ~SystemStorageGetAvailableCapacityFunction() {
 }
 
@@ skipping 34 matching lines @@
     api::system_storage::StorageAvailableCapacityInfo result;
     result.id = transient_id;
     result.available_capacity = available_capacity;
     Respond(OneArgument(result.ToValue()));
   } else {
     Respond(Error("Error occurred when querying available capacity."));
   }
 }
 
 }  // namespace extensions