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Previously, we stored it in InternalDocumentStateData and applied in RenderFrameImpl.
This change moves the override to DocumentLoader, to consolidate navigation
related parameters in Blink.

This corresponds to the step 15.d from the doc linked to the bug.

Bug: 855189
Change-Id: Icfabe5cecec3deaab385d3617bc1d9f77c8c13b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1846795Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704630}