commit d4d458f9c719e0246d8c8cfa952aa7e698124fdc
author Jacob DeWitt <jacde@chromium.org> Tue Mar 19 20:26:34 2019
committer Commit Bot <commit-bot@chromium.org> Tue Mar 19 20:26:34 2019
tree 8444d2d8d01a24b6b1f76368aba751bb4239adcd
parent 0cc616126030a9102233ec1e0ca5e5f5aa8ea180

Add XRSession.viewerSpace and refactor XRFrame.getPose

Also check if XRFrame is an animation frame in XRFrame.getViewerPose

Instead of adding methods like GetInputSource() and ReturnTargetRay() to XRSpace,
there are 3 new classes derived from XRSpace: XRViewerSpace, XRTargetRaySpace, and
XRGripSpace. Instances of those classes can be passed as the first argument to
XRFrame.getPose to trigger the spec-required behavior for those special cases.
XRSpace has a virtual method called getPose which handles the core logic of
XRFrame.getPose. That avoids having a bunch of extra checks in the XRFrame.getPose
method itself.

Bug: 928466
Change-Id: Ib4eeafe8f88b1d2ea2c2685b0112cbbd27f1b653
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1526788
Commit-Queue: Jacob DeWitt <jacde@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Reviewed-by: Klaus Weidner <klausw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#642157}