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

This is a bug (I think)

**What is the current behavior?**

When rendering `<input type="..." />` (without name attribute), it will render `<input type="..." name />` to the DOM.

![2016-07-06 at 09 49](https://cloud.githubusercontent.com/assets/11071/16611205/13bcd376-4360-11e6-9ef5-de6bec6eaa4a.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/).**

Here is the example with the regression using React 15.2.0: https://esnextb.in/?gist=c4923716061ca73e37f7ed476920aa9c

![2016-07-06 at 09 49](https://cloud.githubusercontent.com/assets/11071/16611190/0ba328e8-4360-11e6-8e1a-049048c661f5.png)

**What is the expected behavior?**

No `name` attribute rendered if it is not provided.

Here is the expected behavior with React 15.1.0: https://esnextb.in/?gist=aee86dfa6eec38aa2bc24b4c25425905

![2016-07-06 at 09 54](https://cloud.githubusercontent.com/assets/11071/16611196/10edae9a-4360-11e6-8191-eb19fd9363f8.png)

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

Regression: v15.2.0

Good: v15.1.0

expect(console.error.calls.count()).toBe(1);
    expect(console.error.calls.argsFor(0)[0]).toContain(
      '`valueLink` prop on `input` is deprecated; set `value` and `onChange` instead.'
    );
    ReactTestUtils.renderIntoDocument(
      <input type="text" value="zoink" onChange={jest.fn()} />
    );
    expect(console.error.calls.count()).toBe(1);
    ReactTestUtils.renderIntoDocument(<input type="text" value="zoink" />);
    expect(console.error.calls.count()).toBe(2);
  });
  it('should warn with value and no onChange handler and readOnly specified', function() {
    ReactTestUtils.renderIntoDocument(
      <input type="text" value="zoink" readOnly={true} />
    );
    expect(console.error.calls.count()).toBe(0);
    ReactTestUtils.renderIntoDocument(
      <input type="text" value="zoink" readOnly={false} />
    );
    expect(console.error.calls.count()).toBe(1);
  });
  it('should have a this value of undefined if bind is not used', function() {
    var unboundInputOnChange = function() {
      expect(this).toBe(undefined);
    };
    var instance = <input type="text" onChange={unboundInputOnChange} />;
    instance = ReactTestUtils.renderIntoDocument(instance);
    ReactTestUtils.Simulate.change(instance);
  });
  it('should throw if both value and valueLink are provided', function() {