Re: [service-workers-tests] Add test to ensure FileReaderSync isn't supported in service workers. (#4766)

# Chrome (unstable channel) #
Testing web-platform-tests at revision e95d113b75a273f2d073e5087c56648203a4a527
Using browser at version 58.0.3004.3 dev
Starting 10 test iterations
All results were stable
## All results ##
<details>
<summary><a href="https://w3c-test.org/submissions/4766/service-workers/service-worker/historical.https.html">/service-workers/service-worker/historical.https.html</a></summary>


|                            Subtest                            | Results |
|---------------------------------------------------------------|---------|
|                                                               | ERROR   |
| `Service worker test setup`                                   | PASS    |
| `"FileReaderSync" should not be supported in service workers` | FAIL    |

</details>

View on GitHub: https://github.com/w3c/web-platform-tests/pull/4766#issuecomment-278475111

Received on Wednesday, 8 February 2017 21:58:50 UTC