Notify VRDeviceProviders when there are pages listening for vrdisplayactivate

device/vr/vr_service_impl.cc

 // Copyright 2016 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.
 
 #include "device/vr/vr_service_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "device/vr/vr_device.h"
 #include "device/vr/vr_device_manager.h"
 
 namespace device {
 
-VRServiceImpl::VRServiceImpl() {}
+VRServiceImpl::VRServiceImpl() : listening_for_activate_(false) {}
 
 VRServiceImpl::~VRServiceImpl() {
   RemoveFromDeviceManager();
 }
 
 void VRServiceImpl::BindRequest(
     mojo::InterfaceRequest<mojom::VRService> request) {
   VRServiceImpl* service = new VRServiceImpl();
   service->Bind(std::move(request));
 }
@@ skipping 34 matching lines @@
   client_ = std::move(service_client);
   VRDeviceManager* device_manager = VRDeviceManager::GetInstance();
   // Once a client has been connected AddService will force any VRDisplays to
   // send OnConnected to it so that it's populated with the currently active
   // displays. Thereafer it will stay up to date by virtue of listening for new
   // connected events.
   device_manager->AddService(this);
   callback.Run(device_manager->GetNumberOfConnectedDevices());
 }
 
+void VRServiceImpl::SetListeningForActivate(bool listening) {
+  listening_for_activate_ = listening;
+  VRDeviceManager* device_manager = VRDeviceManager::GetInstance();
+  device_manager->ListeningForActivateChanged(listening);
+}
+
 }  // namespace device