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This CL is part of a series of CLs to remove any remaining logic inside
NavigationHandleImpl.

Bug: 916537
Change-Id: I03c88ff27ea6c05d8aec5a99a07a0ef919670efb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1751983
Commit-Queue: Mohamed Abdelhalim <zetamoo@chromium.org>
Reviewed-by: Arthur Sonzogni <arthursonzogni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#688474}