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

This is a bug report.

**What is the current behavior?**

In Safari, the type of input field is not updated properly. Consider the example linked below. It is a React component that display a button and an input field. The type of input field will be toggled between file or text by clicking the button. The change of input type is not being reflected.

I believe this is an issue with Safari. Setting the `type` property in Safari does not affect what is being rendered:

``` javascript
var a = document.createElement("input");
a.type = "text";
document.body.appendChild(a); // A text input is shown
a.type = "file"; // The input remains a text input in Safari.
```

**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/).**

https://jsfiddle.net/x1xtbjt0/2/

**What is the expected behavior?**

The input type should be changed, as in Chrome and Firefox.

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

React: 15.1.0
ReactDOM: 15.1.0
Browser: Safari 9.1.1, Chrome 51.0.2704.103, Firefox 47.0
OS: OS X 10.11.5

var nodeValueSetter = jest.genMockFn();
    Object.defineProperty(node, 'value', {
      get: function() {
        return nodeValue;
      },
      set: nodeValueSetter.mockImplementation(function(newValue) {
        nodeValue = newValue;
      }),
    });
    ReactDOM.render(<input value="a" />, container);
    expect(nodeValueSetter.mock.calls.length).toBe(0);
    ReactDOM.render(<input value="b"/>, container);
    expect(nodeValueSetter.mock.calls.length).toBe(1);
  });
  it('should properly control a value of number `0`', function() {
    var stub = <input type="text" value={0} onChange={emptyFunction} />;
    stub = ReactTestUtils.renderIntoDocument(stub);
    var node = ReactDOM.findDOMNode(stub);
    node.value = 'giraffe';
    ReactTestUtils.Simulate.change(node);
    expect(node.value).toBe('0');
  });
  it('should have the correct target value', function() {
    var handled = false;
    var handler = function(event) {
      expect(event.target.nodeName).toBe('INPUT');
      handled = true;
    };
    var stub = <input type="text" value={0} onChange={handler} />;
    var container = document.createElement('div');