The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/96e5488ff8ee752b774b20c3eea3ffd0227a70d6

commit 96e5488ff8ee752b774b20c3eea3ffd0227a70d6
Author: amp <amp@chromium.org>
Date: Fri Oct 07 19:20:02 2016

Enable WebVR origin trial experiments.

Intent to Experiment discussion:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/zGAzqfi0e00/atXaz8UCAQAJ

BUG= 652926 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/2385123005
Cr-Commit-Position: refs/heads/master@{#423925}

[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/content/browser/frame_host/render_frame_host_impl.cc
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/bindings/modules/v8/ConditionalFeaturesForModules.cpp
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/gamepad/Gamepad.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/gamepad/GamepadButton.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/gamepad/GamepadPose.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/vr/NavigatorVR.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/vr/VRDisplay.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/vr/VRDisplayCapabilities.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/vr/VRDisplayEvent.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/vr/VRDisplayEventInit.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/vr/VREyeParameters.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/vr/VRFieldOfView.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/vr/VRFrameData.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/vr/VRLayer.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/vr/VRPose.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/modules/vr/VRStageParameters.idl
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/platform/RuntimeEnabledFeatures.in
[modify] https://crrev.com/96e5488ff8ee752b774b20c3eea3ffd0227a70d6/third_party/WebKit/Source/web/FrameLoaderClientImpl.cpp

Code is in place.  Full release is blocked on a bug in the trials framework, and getting all the parts into the official Chrome release.  Setting this blocking on getting the GVR library into the build (which I think is the last major task for getting into official builds).

We still need to sync up with the origin trials team to get WebVR added to the list of available experiments on their sign up page (and possibly some other devrel steps such as adding a README to our samples site with instructions for how to get a token).

See https://github.com/jpchase/OriginTrials/blob/gh-pages/ship-as-trial.md for the full description of what needs to be done.

Assigning to Megan to finish off those parts (or reassign as needed).

Some clarification about the trials framework bug.

crbug/653671 blocks the ability to enable the trial via an html meta tag in the header.  If the trial token is included the the http headers it should work fine.

The origin trial is now working in M56 canary.  I'm not sure if we want to mark this as fixed now, or after the trial sign up ui is enabled.

Let's close it once the sign up UI has landed.

Blog post went out and sign up ui is ready.  Marking as fixed.