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**Do you want to request a *feature* or report a *bug*?**
*bug*

**What is the current behavior?**

Since React@16.5 seems that `root` element has `onclick` event handler with noop function.
In ios Safari/Chrome browsers html element has gray overlay when tap on it.

The current behavior is that the whole `root` is blinking when we tap on it.

The simple example to reproduce:
https://codesandbox.io/s/wyo8rlj1zk
The issue is reproducing only in fullscreen mode https://wyo8rlj1zk.codesandbox.io/
(root container is steel blue)

I suppose changes came from here:
https://github.com/facebook/react/pull/11927
https://github.com/facebook/react/pull/11927/files

and the issue can be related with:
https://github.com/mui-org/material-ui/issues/11154
https://github.com/facebook/react/issues/12717

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
React 16.5
ios 11.3/12 Safari/Chrome
expect(() => {
        
        el = ReactTestUtils.renderIntoDocument(<div whatever />);
      }).toWarnDev(
        'Received `true` for a non-boolean attribute `whatever`.\n\n' +
          'If you want to write it to the DOM, pass a string instead: ' +
          'whatever="true" or whatever={value.toString()}.',
      );
      expect(el.hasAttribute('whatever')).toBe(false);
    });
    it('assigns a numeric custom attributes as a string', function() {
      const el = ReactTestUtils.renderIntoDocument(<div whatever={3} />);
      expect(el.getAttribute('whatever')).toBe('3');
    });
    it('will not assign a function custom attributes', function() {
      let el;
      expect(() => {
        el = ReactTestUtils.renderIntoDocument(<div whatever={() => {}} />);
      }).toWarnDev('Warning: Invalid value for prop `whatever` on <div> tag');
      expect(el.hasAttribute('whatever')).toBe(false);
    });
    it('will assign an object custom attributes', function() {
      const el = ReactTestUtils.renderIntoDocument(<div whatever={{}} />);
      expect(el.getAttribute('whatever')).toBe('[object Object]');
    });
    it('allows cased data attributes', function() {
      let el;
      expect(() => {
        el = ReactTestUtils.renderIntoDocument(<div data-fooBar="true" />);
      }).toWarnDev(