GitLab

Use WebContents::GetLastCommittedURL to compute the last URL.

Change-Id: I829c01287a9902c302c87d7a127bde70303558a3
Bug: 1037945
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1982235
Commit-Queue: Tarun Bansal <tbansal@chromium.org>
Reviewed-by: Michael Crouse <mcrouse@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727603}