[presentation-api] Pull Request: Fix typo in code for Example 7.

lauweijie has just submitted a new pull request for 
https://github.com/w3c/presentation-api:

== Fix typo in code for Example 7. ==
I believe `message` should be an EventHandler, so the message itself 
should be `message.data` as in the previous examples.

See https://github.com/w3c/presentation-api/pull/326

Received on Wednesday, 20 July 2016 19:06:44 UTC