WebVR: Add sanity checks for decoded pose index values

device/vr/android/gvr/gvr_device_provider.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/android/gvr/gvr_device_provider.h"
 
 #include <jni.h>
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
@@ skipping 63 matching lines @@
   // If we're presenting currently stop.
   GvrDelegateProvider* delegate_provider = GvrDelegateProvider::GetInstance();
   if (delegate_provider)
     delegate_provider->ExitWebVRPresent();
 }
 
 void GvrDeviceProvider::OnGvrDelegateReady(
     const base::WeakPtr<GvrDelegate>& delegate) {
   if (!vr_device_)
     return;
+  VLOG(1) << "Switching to presenting delegate";
   vr_device_->SetDelegate(delegate);
   GamepadDataFetcherManager::GetInstance()->AddFactory(
       new GvrGamepadDataFetcher::Factory(delegate, vr_device_->id()));
 }
 
 // VR presentation exit requested by the delegate (probably via UI).
 void GvrDeviceProvider::OnGvrDelegateRemoved() {
   if (!vr_device_)
     return;
 
@@ skipping 17 matching lines @@
   if (!vr_device_)
     return;
   vr_device_->OnActivate(mojom::VRDisplayEventReason::MOUNTED);
 }
 
 void GvrDeviceProvider::SwitchToNonPresentingDelegate() {
   GvrDelegateProvider* delegate_provider = GvrDelegateProvider::GetInstance();
   if (!vr_device_ || !delegate_provider)
     return;
 
+  VLOG(1) << "Switching to non-presenting delegate";
   vr_device_->SetDelegate(delegate_provider->GetNonPresentingDelegate());
 
   // Remove GVR gamepad polling.
   GamepadDataFetcherManager::GetInstance()->RemoveSourceFactory(
       GAMEPAD_SOURCE_GVR);
 }
 
 void GvrDeviceProvider::SetListeningForActivate(bool listening) {
   device::GvrDelegateProvider* delegate_provider =
       device::GvrDelegateProvider::GetInstance();
   if (!delegate_provider)
     return;
 
   delegate_provider->SetListeningForActivate(listening);
 }
 
 }  // namespace device