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Following https://chromium-review.googlesource.com/c/chromium/src/+/2628748,
this is the only code path that uses this file and I want to delete it.
Plus, the browser test currently doesn't depend on the file contents so
it can be any arbitrary file.

Change-Id: I65dcf1665f8b35a35247b6e80f2be68fa1c1b761
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2629657
Commit-Queue: Sophie Chang <sophiechang@chromium.org>
Commit-Queue: Scott Little <sclittle@chromium.org>
Reviewed-by: Michael Crouse <mcrouse@chromium.org>
Reviewed-by: Scott Little <sclittle@chromium.org>
Auto-Submit: Sophie Chang <sophiechang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843786}