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This method has no overrides and always returns true. This change
removes it, removes the only call to it, and simplifies code around
that call site as a result.

Bug: None
Change-Id: I2c5b13552923f11615e5b2e629fc2da70fb26eb8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2367650
Commit-Queue: Robert Liao <robliao@chromium.org>
Reviewed-by: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800426}