Histogram tracking for new UI Automation APIs

Expand the Accessibility.WinAPIs histogram to include newly implemented
control pattern APIs. This will be used to inform heuristics for
progressively enabling accessibility flags in UIA mode.

Bug: 847971
Change-Id: I8dc6463613e6b87e54b63e3a690f25c6a5c590ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1529748
Commit-Queue: Kevin Babbitt <kbabbitt@microsoft.com>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#642774}
5 files changed