Fix controller positioning in VrShell when gyro reads are small

Fix controller positioning in VrShell when gyro reads are small

BUG=716201
Review-Url: https://codereview.chromium.org/2853843002
Cr-Commit-Position: refs/heads/master@{#468375}
Committed: https://chromium.googlesource.com/chromium/src/+/f00f17c2badfd4132e5cac30413804ce34f72cbe

[acondor_, 2017-05-01 17:39:16]

acondor@google.com changed reviewers:
+ mthiesse@chromium.org

[acondor_, 2017-05-01 17:39:16]

PTAL

[mthiesse, 2017-05-01 17:47:31]

Can you please also add a DCHECK to vr::NormalizeQuat, and have it not return
NaN somehow if we pass it a quat with a length of 0?

[acondor_, 2017-05-01 17:49:43]

On 2017/05/01 17:47:31, mthiesse wrote:
> Can you please also add a DCHECK to vr::NormalizeQuat, and have it not return
> NaN somehow if we pass it a quat with a length of 0?

Done.

[mthiesse, 2017-05-01 17:50:56]

lgtm

[acondor_, 2017-05-01 17:51:30]

The CQ bit was checked by acondor@google.com

[commit-bot: I haz the power, 2017-05-01 17:51:53]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-01 18:55:38]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1493661090916220,
"parent_rev": "b9c3c20ba9a2a3c05b6d0f976e4a2d71c8a74fa6", "commit_rev":
"f00f17c2badfd4132e5cac30413804ce34f72cbe"}

[commit-bot: I haz the power, 2017-05-01 18:56:45]

Description was changed from

==========
Fix controller positioning in VrShell when gyro reads are small

BUG=716201
==========

to

==========
Fix controller positioning in VrShell when gyro reads are small

BUG=716201

Review-Url: https://codereview.chromium.org/2853843002
Cr-Commit-Position: refs/heads/master@{#468375}
Committed:
https://chromium.googlesource.com/chromium/src/+/f00f17c2badfd4132e5cac304138...
==========

[commit-bot: I haz the power, 2017-05-01 18:56:46]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/f00f17c2badfd4132e5cac304138...