**Do you want to request a _feature_ or report a _bug_?**

This is a bug

**What is the current behavior?**

![screen shot 2016-07-03 at 4 12 19 pm](https://cloud.githubusercontent.com/assets/1697380/16544656/b3f896b2-4140-11e6-923a-06fc630c92df.png)
![screen shot 2016-07-03 at 4 11 15 pm](https://cloud.githubusercontent.com/assets/1697380/16544657/b3f8f292-4140-11e6-8b03-0ecaa3165460.png)

**If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://jsfiddle.net or similar (template: https://jsfiddle.net/reactjs/69z2wepo/).**

Using 15.2.0 react and react-dom

**What is the expected behavior?**

![screen shot 2016-07-03 at 4 13 05 pm](https://cloud.githubusercontent.com/assets/1697380/16544659/b938951e-4140-11e6-9275-2c3721542003.png)
![screen shot 2016-07-03 at 4 13 10 pm](https://cloud.githubusercontent.com/assets/1697380/16544660/b9391278-4140-11e6-9951-0f81024ce859.png)

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**

In 15.2.0, extra attributes `name` and `value` with empty values are added to the submit button of a form.

It works in 15.1.0.

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */
import {getCurrentFiberOwnerNameInDevOrNull} from 'react-reconciler/src/ReactCurrentFiber';
import invariant from 'shared/invariant';
import warning from 'shared/warning';
import * as DOMPropertyOperations from './DOMPropertyOperations';
import {getFiberCurrentPropsFromNode} from './ReactDOMComponentTree';
import {getToStringValue, toString} from './ToStringValue';
import ReactControlledValuePropTypes from '../shared/ReactControlledValuePropTypes';
import * as inputValueTracking from './inputValueTracking';
import type {ToStringValue} from './ToStringValue';
type InputWithWrapperState = HTMLInputElement & {
  _wrapperState: {
    initialValue: ToStringValue,
    initialChecked: ?boolean,
    controlled?: boolean,
  },
};
let didWarnValueDefaultValue = false;
let didWarnCheckedDefaultChecked = false;
let didWarnControlledToUncontrolled = false;
let didWarnUncontrolledToControlled = false;
function isControlled(props) {