Disable COM DCHECKs for IsolatedXRDevice process

Some APIs we are using internally create thread pool threads, and use
the implicit MTA on those threads.  This is not a bug, so
AssertComInitialized is over-active in this case.

Bug: 950046
Change-Id: I5498c59444a731d95970e8096dfa2fdc6f46ff99
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1582873
Reviewed-by: Robert Liao <robliao@chromium.org>
Commit-Queue: Robert Liao <robliao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#654333}
3 files changed