The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/16edd27467d3490c9f7f46b2b6661d492e780c57

commit 16edd27467d3490c9f7f46b2b6661d492e780c57
Author: Arthur Sonzogni <arthursonzogni@chromium.org>
Date: Mon Jul 30 08:58:42 2018

Fix test: http/tests/navigation/back-send-referrer.html

The navigation may be triggered before the load event. When it happens,
the history entry must replace the current one instead of being appended
to it. Then history.go(-1) fails in the next document.

This CL make the navigation to happen after the load event.

Bug:  862580 , 831155
Change-Id: I4a48d50f5899e3fd65c74d9a89ab836ae94ba7be
Reviewed-on: https://chromium-review.googlesource.com/1133261
Reviewed-by: Nate Chapin <japhet@chromium.org>
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#578998}
[modify] https://crrev.com/16edd27467d3490c9f7f46b2b6661d492e780c57/third_party/WebKit/LayoutTests/http/tests/navigation/back-send-referrer.html

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5f32e29a69aaeb7c3cb9a29835669cc8116ed404

commit 5f32e29a69aaeb7c3cb9a29835669cc8116ed404
Author: Arthur Sonzogni <arthursonzogni@chromium.org>
Date: Mon Jul 30 09:42:52 2018

Fix 2 flaky blink layout tests.

The test http/tests/misc/adopt-iframe-src-attr-after-remove.html as
always been a bit flaky:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=http%2Ftests%2Fmisc%2Fadopt-iframe-src-attr-after-remove.html&testType=webkit_layout_tests

The reason is that navigations triggered by a script before the onload
handler don't generate back/forward entries.
See third_party/blink/public/web/web_history_commit_type.h

Sometimes, this test was fast enough so that no history entry was created.
Then history.back() failed and it ended with a timeout.

This is the same for:
http/tests/misc/resource-timing-iframe-restored-from-history.html

Bug:  862580 , 831155
Change-Id: I3b8243c5f43c5043de8e23acfbe561a648c0f115
Reviewed-on: https://chromium-review.googlesource.com/1133170
Reviewed-by: Nate Chapin <japhet@chromium.org>
Commit-Queue: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579001}
[modify] https://crrev.com/5f32e29a69aaeb7c3cb9a29835669cc8116ed404/third_party/WebKit/LayoutTests/fast/history/history-back-initial-vs-final-url.html
[modify] https://crrev.com/5f32e29a69aaeb7c3cb9a29835669cc8116ed404/third_party/WebKit/LayoutTests/http/tests/misc/resource-timing-iframe-restored-from-history.html