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This patch replaces the base::RunLoop().RunUntilIde() with base::RunLoop loop,
which will reduce the time delay and make those unit tests deterministic.

Bug: 973005
Change-Id: I3fa718ef0926b38385c53f0af9d6ce8865a87660
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1760670
Commit-Queue: Makoto Shimazu <shimazu@chromium.org>
Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#691968}