Version: **15.0.0-rc.1**
Fiddle: https://jsfiddle.net/69z2wepo/33980/ (check console)

For an example providing `NaN` to a css property will result in "_NaN is an invalid value for the fontSize css style property_".
Now I'm aware that there is an error in my code but I have no idea which component I should check.
I would like to have something like this: "_NaN is an invalid value for the fontSize style property. Check the render method of Header_".
I'll be happy to try to solve this if this is something we want to do.

'Warning: a `div` tag (owner: `One`) was passed a numeric string value ' +
        'for CSS property `fontSize` (value: `1`) which will be treated ' +
        'as a unitless number in a future version of React.'
      );
      
      ReactDOM.render(<One inline={true} />, div);
      expect(console.error.calls.length).toBe(1);
      
      ReactDOM.render(<Two />, div);
      expect(console.error.calls.length).toBe(2);
      expect(console.error.argsForCall[1][0]).toBe(
        'Warning: a `div` tag (owner: `Two`) was passed a numeric string value ' +
        'for CSS property `fontSize` (value: `1`) which will be treated ' +
        'as a unitless number in a future version of React.'
      );
      
      ReactDOM.render(<One inline={true} />, div);
      expect(console.error.calls.length).toBe(2);
    });
    it('should warn nicely about NaN in style', function() {
      spyOn(console, 'error');
      var style = {fontSize: NaN};
      var div = document.createElement('div');
      ReactDOM.render(<span style={style}></span>, div);
      ReactDOM.render(<span style={style}></span>, div);
      expect(console.error.argsForCall.length).toBe(1);
      expect(console.error.argsForCall[0][0]).toEqual(
        'Warning: `NaN` is an invalid value for the `fontSize` css style property',
      );
    });