Send storage event

[snf]

Addresses #5196

[highfive]

Thanks for the pull request, and welcome! The Servo team is excited to review your changes, and you should hear from @kmcallister (or someone else) soon.

[hoppipolla-critic-bot]

Critic review: https://critic.hoppipolla.co.uk/r/4417

This is an external review system which you may optionally use for the code review of your pull request.

In order to help critic track your changes, please do not make in-place history rewrites (e.g. via git rebase -i or git commit --amend) when updating this pull request.

[snf]

I think all the issues are solved now, I made some changes by mistake in critic and when trying to undo them I messed the issues a little. Sorry.

[jdm]

One slight comment nit left!

[snf]

Done!, squash?

[jdm]

Yep!

[snf]

Done!

[jdm]

Can you squash the test changes too?

[snf]

Better!

[jdm]

r+

[bors-servo]

saw approval from jdm
at snf@1cc5bd4

[bors-servo]

merging snf/servo/send_storage_event = 1cc5bd4 into auto

[bors-servo]

snf/servo/send_storage_event = 1cc5bd4 merged ok, testing candidate = c0c5487

[bors-servo]

all tests pass:
success: http://build.servo.org/builders/linux1/builds/1231
success: http://build.servo.org/builders/linux2/builds/1229
success: http://build.servo.org/builders/android/builds/1265
success: http://build.servo.org/builders/mac1/builds/1444
success: http://build.servo.org/builders/mac2/builds/1447
success: http://build.servo.org/builders/gonk/builds/411

[bors-servo]

fast-forwarding master to auto = c0c5487