GitLab

Add MeasureAs attributes for geolocation methods so usage of the feature
can be tracked through UseCounter.

BUG=780267

Change-Id: I8994be04aa750971204f515d66f5834ce38ab8c8
Reviewed-on: https://chromium-review.googlesource.com/747862Reviewed-by: Vincent Scheib <scheib@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Vincent Scheib <scheib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513031}