GitLab

This is a reland of 2c0e1ed7
Renamed CRWNavigationItemHolder's |-setNavigationItem| to
|-replaceNavigationItem| to fix xcode_clang error.

Original change's description:
> [Nav Experiment] Associate NavigationItem with WKBackForwardList.
> 
> Added WKBasedNavigationManagerTest for implementation-specific test
> cases. The majority of WKBasedNavigationManagerImpl can be tested
> using NavigationManagerTest. This will be enabled in a subsequent CL.
> 
> Bug: 734150
> Change-Id: Ief59f397a72fd5bb1404e94a58486fa3daa87780
> Reviewed-on: https://chromium-review.googlesource.com/580628
> Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
> Reviewed-by: Eugene But <eugenebut@chromium.org>
> Commit-Queue: Danyao Wang <danyao@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#490117}

Bug: 734150
Change-Id: I277c048478a9a0fa9aea2962d10b56059d84fc5b
Reviewed-on: https://chromium-review.googlesource.com/592273
Commit-Queue: Danyao Wang <danyao@chromium.org>
Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491130}