**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.

state = {
        value: '.98',
      };
      render() {
        return <input type="number" value={this.state.value} />;
      }
    }
    let stub;
    expect(() => {
      stub = ReactDOM.render(<Stub />, container);
    }).toWarnDev(
      'You provided a `value` prop to a form field ' +
        'without an `onChange` handler.',
    );
    const node = ReactDOM.findDOMNode(stub);
    stub.setState({value: '0.98'});
    expect(node.value).toEqual('0.98');
  });
  it('performs a state change from "" to 0', () => {
    class Stub extends React.Component {
      state = {
        value: '',
      };
      render() {
        return <input type="number" value={this.state.value} readOnly={true} />;
      }
    }
    const stub = ReactDOM.render(<Stub />, container);