Clean up WebVR RequestPresent and make callback asynchronous.

device/vr/vr_device.cc

 // 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.
 
 #include "device/vr/vr_device.h"
 #include "device/vr/vr_device_provider.h"
 #include "device/vr/vr_service_impl.h"
 
 namespace device {
 
 unsigned int VRDevice::next_id_ = 1;
 
 VRDevice::VRDevice() : presenting_service_(nullptr), id_(next_id_) {
   // Prevent wraparound. Devices with this ID will be treated as invalid.
   if (next_id_ != VR_DEVICE_LAST_ID)
     next_id_++;
 }
 
 VRDevice::~VRDevice() {}
 
-bool VRDevice::RequestPresent(bool secure_origin) {
-  return true;
-};
+void VRDevice::RequestPresent(const base::Callback<void(bool)>& callback) {
+  callback.Run(true);
+}
+
+void VRDevice::SetSecureOrigin(bool secure_origin) {}
 
 void VRDevice::AddService(VRServiceImpl* service) {
   // Create a VRDisplayImpl for this service/device pair
   VRDisplayImpl* display_impl = service->GetVRDisplayImpl(this);
   displays_.insert(std::make_pair(service, display_impl));
 }
 
 void VRDevice::RemoveService(VRServiceImpl* service) {
   if (IsPresentingService(service))
     ExitPresent();
@@ skipping 43 matching lines @@
 void VRDevice::OnDeactivate(mojom::VRDisplayEventReason reason) {
   for (const auto& display : displays_)
     display.second->client()->OnDeactivate(reason);
 }
 
 void VRDevice::SetPresentingService(VRServiceImpl* service) {
   presenting_service_ = service;
 }
 
 }  // namespace device