Blacklist low scale factors.
Blacklist low scale factors.

For any device-scaling-factor < 1.3, a device-scaling-factor of 1 will
be enforced.

This fixes blurriness with monitors that only have a slightly higher
resolution than 96 dpi, but high enough to result in a
device-scaling-factor of >1.

BUG=484400

Review URL: https://codereview.chromium.org/1324513002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#347156}

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