Refactor the usage of AfterStartupTaskUtils in ModuleInspector

Now the AfterStartupTaskUtils class is used to get notified when startup
is finished and the ModuleInspector has the responsability of posting
the InspectModule tasks.

Bug: 921746
Change-Id: I87a4e1fc82ee3f962da1b601ebb640ad6952d0b4
Reviewed-on: https://chromium-review.googlesource.com/c/1413361
Commit-Queue: Patrick Monette <pmonette@chromium.org>
Reviewed-by: S├ębastien Marchand <sebmarchand@chromium.org>
Cr-Commit-Position: refs/heads/master@{#623765}
3 files changed