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.

checkDebugID(debugID);
    emitEvent('onBeginReconcilerTimer', debugID, timerType);
  },
  onEndReconcilerTimer(debugID, timerType) {
    checkDebugID(debugID);
    emitEvent('onEndReconcilerTimer', debugID, timerType);
  },
  onBeginProcessingChildContext() {
    emitEvent('onBeginProcessingChildContext');
  },
  onEndProcessingChildContext() {