Re: [preload-tests] Rewrite preload test. (#4683)

# Firefox (nightly channel) #
Testing web-platform-tests at revision e6921c93631aa6e7fba6056c2705f256928ed221
Using browser at version BuildID 20170123125947; SourceStamp 36486fdc3813ef7943ae5b07b4128866d1938a6c
Starting 10 test iterations
All results were stable

## All results ##

<details>

<summary><a href="http://w3c-test.org/submissions/4683/preload/single_download_late_used_preload.html">/preload/single_download_late_used_preload.html</a></summary>


|                             Subtest                             | Results |
|-----------------------------------------------------------------|---------|
|                                                                 | OK      |
| `Ensure preloaded resources are not downloaded again when used` | FAIL    |

</details>


View on GitHub: https://github.com/w3c/web-platform-tests/pull/4683#issuecomment-276522339

Received on Tuesday, 31 January 2017 23:06:01 UTC