[jumbo] Rename one of two GetDeviceScaleFactor functions

There are two (similar but not identical)
GetDeviceScaleFactor() functions in chrome/browser and in some
extreme jumbo configurations those clash.

This renames one of them to GetPrimaryDisplayScaleFactor()

Change-Id: I55e7bf310eab4a21e7e56bb21c6c6accf0de3eff
Reviewed-on: https://chromium-review.googlesource.com/c/1378097
Reviewed-by: Nigel Tao <nigeltao@chromium.org>
Commit-Queue: Daniel Bratell <bratell@opera.com>
Cr-Commit-Position: refs/heads/master@{#618139}
1 file changed