GitLab

Identify RenderFrameHosts using ID pairs instead of raw pointers, to
make it possible to check if the IDs are still valid when used later.

Bug: 1106342
Change-Id: I8ada468136a61eb837ad7d8b092915d17e958e45
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2305191Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Jeongeun Kim <je_julie.kim@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791150}