We purge it [here](https://github.com/facebook/react/blob/b11540ccb2321aeb7259fcf0b3a38aeeea35231d/src/isomorphic/ReactDebugTool.js#L88-L89) but this code doesn’t run because of the [early exit](https://github.com/facebook/react/blob/b11540ccb2321aeb7259fcf0b3a38aeeea35231d/src/isomorphic/ReactDebugTool.js#L53-L57).

Need to fix this and add a test case to make sure we don’t regress on it.

type: 'update attribute',
          payload: { className: 'mad' },
        }, {
          instanceID: inst._debugID,
          type: 'update attribute',
          payload: { tabIndex: 42 },
        }, {
          instanceID: inst._debugID,
          type: 'remove attribute',
          payload: 'className',
        }, {
          instanceID: inst._debugID,
          type: 'update attribute',
          payload: { tabIndex: 43 },
        }]);
      });
    });
    describe('attribute that gets removed with certain values', () => {
      it('gets recorded as a removal during an update', () => {
        var node = document.createElement('div');
        ReactDOM.render(<div />, node);
        var inst = ReactDOMComponentTree.getInstanceFromNode(node.firstChild);
        ReactNativeOperationHistoryDevtool.clearHistory();
        ReactDOM.render(<div disabled={true} />, node);
        ReactDOM.render(<div disabled={false} />, node);
        assertHistoryMatches([{
          instanceID: inst._debugID,
          type: 'update attribute',
          payload: { disabled: true },
        }, {