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I need to introduce it so I have a place to put some crash and metrics
consent code that needs to run early in browser startup.

No functional changes.

Bug: 1148604
Change-Id: I9dca170b1cf9f0453e174d7cbe0a0b8652f7328b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2508367Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828773}