GitLab

When navigating page inside the same renderer with browser-side
navigation, we are too late with unpausing the Page.

As a result, the page still considers itself paused and hits
a DCHECK in DocumentLoader::FinishedLoading.

R=dgozman

Change-Id: I0998b94c4a379c23bd44d56a6cb7c9fb4aa3bb5c
Reviewed-on: https://chromium-review.googlesource.com/1132378
Commit-Queue: Andrey Lushnikov <lushnikov@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#574016}