Make the LCD text device scale factor threshold 1.5 inclusive
Make the LCD text device scale factor threshold 1.5 inclusive

Currently, compositing will be preferred to LCD text on all Android
devices as well as on other platforms when the device scale factor is
strictly greater than 1.5. As the 1.5 cutoff was somewhat arbitrary, and
many popular tablets have a scale factor of 1.5, switch that threshold
to be 1.5 inclusive. This improves scroll performance on such devices,
where smooth touchscreen or touchpad scrolling is a likely scenario.

BUG=517188

Review URL: https://codereview.chromium.org/1293083003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#344317}

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