Move get_groupPosition and get_localizedExtendedRole to AXPlatformNodeWin.

Bug: 703369
Change-Id: I532f3c543431bebef28974e35ab699c7439019c6
Reviewed-on: https://chromium-review.googlesource.com/636708
Reviewed-by: Nektarios Paisios <nektar@chromium.org>
Commit-Queue: Doug Turner <dougt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#498209}
4 files changed