Prevent the browser from crashing when exiting pages that use WebVR.

device/vr/vr_display_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 <utility>
 
 #include "base/bind.h"
 #include "device/vr/vr_device.h"
 #include "device/vr/vr_service_impl.h"
 
 namespace device {
 
 VRDisplayImpl::VRDisplayImpl(device::VRDevice* device, VRServiceImpl* service)
     : binding_(this), device_(device), service_(service) {
   mojom::VRDisplayInfoPtr display_info = device->GetVRDevice();
   // Client might be null in unittest.
   // TODO: setup a mock client in unittest too?
   if (service->client()) {
     service->client()->OnDisplayConnected(binding_.CreateInterfacePtrAndBind(),
                                           mojo::GetProxy(&client_),
                                           std::move(display_info));
   }
 }
 
 VRDisplayImpl::~VRDisplayImpl() {}
 
 void VRDisplayImpl::GetPose(const GetPoseCallback& callback) {
-  if (!device_->IsAccessAllowed(service_.get())) {
+  if (!device_->IsAccessAllowed(service_)) {
     callback.Run(nullptr);
     return;
   }
 
   callback.Run(device_->GetPose());
 }
 
 void VRDisplayImpl::ResetPose() {
-  if (!device_->IsAccessAllowed(service_.get()))
+  if (!device_->IsAccessAllowed(service_))
     return;
 
   device_->ResetPose();
 }
 
 void VRDisplayImpl::RequestPresent(bool secureOrigin,
                                    const RequestPresentCallback& callback) {
-  if (!device_->IsAccessAllowed(service_.get())) {
+  if (!device_->IsAccessAllowed(service_)) {
     callback.Run(false);
     return;
   }
 
   bool success = device_->RequestPresent(secureOrigin);
   if (success) {
-    device_->SetPresentingService(service_.get());
+    device_->SetPresentingService(service_);
   }
   callback.Run(success);
 }
 
 void VRDisplayImpl::ExitPresent() {
-  if (device_->IsPresentingService(service_.get()))
+  if (device_->IsPresentingService(service_))
     device_->ExitPresent();
 }
 
 void VRDisplayImpl::SubmitFrame(mojom::VRPosePtr pose) {
-  if (!device_->IsPresentingService(service_.get()))
+  if (!device_->IsPresentingService(service_))
     return;
   device_->SubmitFrame(std::move(pose));
 }
 
 void VRDisplayImpl::UpdateLayerBounds(mojom::VRLayerBoundsPtr left_bounds,
                                       mojom::VRLayerBoundsPtr right_bounds) {
-  if (!device_->IsAccessAllowed(service_.get()))
+  if (!device_->IsAccessAllowed(service_))
     return;
 
   device_->UpdateLayerBounds(std::move(left_bounds), std::move(right_bounds));
 }
 }