GitLab

Add browser-test to verify that the document.visibilityState is set to
"hidden" when a web.Frame is created.

Also clean up FrameImpl::set_semantics_manager_for_test() not to require
a fidl::InterfacePtr<>, to simplify the calling tests.

Bug: 1109270
Change-Id: Ief6acc4aacb2e97d64896d30b75d2a3cf2cb9b98
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2355924
Auto-Submit: Wez <wez@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798561}