GitLab

Refactors all the classes in
//device/vr/windows_mixed_reality/wrappers/wmr_origins.h to inherit
from an interface, and switches the mock versions to inherit from the
same interface instead of subclassing the real versions.

Also moves the static creation functions into factories in
//device/vr/windows_mixed_reality/wrappers/wmr_wrapper_factories.h,
which now guarantee that the mock and real classes can't be mixed
together.

Bug: 961020
Change-Id: I0928bcadc9d942bd6ea513c156c832ffcaf0433f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1603748Reviewed-by: Bill Orr <billorr@chromium.org>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659124}