Isolate a presenting VR device from pages other than the one presenting.

device/vr/android/gvr/gvr_device.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.h"
 
 #include <math.h>
 #include <algorithm>
 
 #include "base/time/time.h"
@@ skipping 123 matching lines @@
     pose->position[2] = decomposed_transform.translate[2];
   }
 
   return pose;
 }
 
 void GvrDevice::ResetPose() {
   delegate_->gvr_api()->ResetTracking();
 }
 
-void GvrDevice::RequestPresent() {
+bool GvrDevice::RequestPresent() {
   delegate_->RequestWebVRPresent();
+  return true;
 }
 
 void GvrDevice::ExitPresent() {
   delegate_->ExitWebVRPresent();
 }
 
-void GvrDevice::SubmitFrame() {
+void GvrDevice::SubmitFrame(VRPosePtr pose) {
   delegate_->SubmitWebVRFrame();
 }
 
 void GvrDevice::UpdateLayerBounds(VRLayerBoundsPtr leftBounds,
                                   VRLayerBoundsPtr rightBounds) {
   delegate_->UpdateWebVRTextureBounds(0,  // Left eye
                                       leftBounds->left, leftBounds->top,
                                       leftBounds->width, leftBounds->height);
   delegate_->UpdateWebVRTextureBounds(1,  // Right eye
                                       rightBounds->left, rightBounds->top,
                                       rightBounds->width, rightBounds->height);
 }
 
 }  // namespace device