Fixes 2D-to-WebVR site transitions when browsing in VR.

device/vr/vr_service.mojom

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module device.mojom;
 
 import "mojo/common/time.mojom";
 
 // A field of view, given by 4 degrees describing the view from a center point.
 struct VRFieldOfView {
@@ skipping 54 matching lines @@
 enum VRDisplayEventReason {
   NONE = 0,
   NAVIGATION = 1,
   MOUNTED = 2,
   UNMOUNTED = 3
 };
 
 // TODO(shaobo.yan@intel.com) : Add comments to describe these interfaces about
 // how to use and where they live.
 interface VRService {
-  // TODO(shaobo.yan@intel.com) : Use a factory function which took a
-  // VRServiceClient so we would never have a half-initialized VRService.
+  // TODO(shaobo.yan@intel.com, crbug/701027): Use a factory function which took

[amp, 2017/03/14 17:05:51]

nit since you are already changing this line: s/took/takes/ and s/would/will/ on
the next line.

[tiborg, 2017/03/14 17:46:00]

Done.

+  // a VRServiceClient so we would never have a half-initialized VRService.
   SetClient(VRServiceClient client) => (uint32 numberOfConnectedDevices);
   // Inform the service that the page is listening for vrdisplayactivate events.
   SetListeningForActivate(bool listening);
 };
 
 interface VRServiceClient {
   OnDisplayConnected(VRDisplay display, VRDisplayClient& request,
                      VRDisplayInfo displayInfo);
 };
 
@@ skipping 19 matching lines @@
 };
 
 interface VRDisplayClient {
   OnChanged(VRDisplayInfo display);
   OnExitPresent();
   OnBlur();
   OnFocus();
   OnActivate(VRDisplayEventReason reason);
   OnDeactivate(VRDisplayEventReason reason);
 };