NavigationSimulator: Simulate item and document sequence number.

Simulate Blink assigning an item and document sequence number to the
navigation. This is similar to what is done in
TestRenderFrameHost::SendNavigateWithParameters().

Bug: 728571
Change-Id: I6915d7e80154779c87294d71a1a395b862fc428b
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_browser_side_navigation_rel
Reviewed-on: https://chromium-review.googlesource.com/579380
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Reviewed-by: Camille Lamy <clamy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488310}
1 file changed