GitLab

This change initializes the Windows Runtime as an MTA for versions at
or above Windows 8 and COM as an MTA for versions below Windows 8 if
the caller requests for COM MTA.

BUG=706479

Change-Id: I55e08bb270ac9d1ebbce35647e8ae23ec8504f95
Reviewed-on: https://chromium-review.googlesource.com/741455
Commit-Queue: Robert Liao <robliao@chromium.org>
Reviewed-by: François Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#513235}