Fix incorrect static position, and container_border_physical_offset_

I was not interpreting offset correctly if static position was kTopRight
and we were looking for RightInset.

Renamed methods RightInset (instead of RightPosition) trying to make 
it more explicit, and less error prone.

Bug: 740993
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_layout_ng
Change-Id: I97c12ef1adce31f73b01e4c20850dd18ac01c443
Reviewed-on: https://chromium-review.googlesource.com/658403
Commit-Queue: Aleks Totic <atotic@chromium.org>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#501155}
14 files changed