**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 inst = this;
  ReactDOMOption.postMountWrapper(inst);
}
var setContentChildForInstrumentation = emptyFunction;
if (__DEV__) {
  setContentChildForInstrumentation = function(content) {
    var hasExistingContent = this._contentDebugID != null;
    var debugID = this._debugID;
    var contentDebugID = debugID + '#text';
    if (content == null) {
      if (hasExistingContent) {
        ReactInstrumentation.debugTool.onUnmountComponent(this._contentDebugID);
      }
      this._contentDebugID = null;
      return;
    }
    this._contentDebugID = contentDebugID;
    var text = '' + content;
    ReactInstrumentation.debugTool.onSetDisplayName(contentDebugID, '#text');
    ReactInstrumentation.debugTool.onSetParent(contentDebugID, debugID);
    ReactInstrumentation.debugTool.onSetText(contentDebugID, text);
    if (hasExistingContent) {
      ReactInstrumentation.debugTool.onBeforeUpdateComponent(contentDebugID, content);
      ReactInstrumentation.debugTool.onUpdateComponent(contentDebugID);
    } else {
      ReactInstrumentation.debugTool.onBeforeMountComponent(contentDebugID, content);
      ReactInstrumentation.debugTool.onMountComponent(contentDebugID);