mojo VR interface simplified

device/vr/android/gvr/gvr_device.cc

Index: device/vr/android/gvr/gvr_device.cc
diff --git a/device/vr/android/gvr/gvr_device.cc b/device/vr/android/gvr/gvr_device.cc
index 9238409817038e7f9ada4174f54f00923ae0bab6..1963d38ddaaff7ae8c5511bf56aecbc81103d201 100644
--- a/device/vr/android/gvr/gvr_device.cc
+++ b/device/vr/android/gvr/gvr_device.cc
@@ -127,9 +127,12 @@ VRDisplayPtr GvrDevice::GetVRDevice() {
   return device;
 }
 
-VRPosePtr GvrDevice::GetPose() {
+VRPosePtr GvrDevice::GetPose(VRServiceImpl* service) {
   TRACE_EVENT0("input", "GvrDevice::GetSensorState");
 
+  if (CheckAccessAllowed(service))
+    return nullptr;
+
   VRPosePtr pose = VRPose::New();
 
   pose->timestamp = base::Time::Now().ToJsTime();
@@ -186,39 +189,65 @@ VRPosePtr GvrDevice::GetPose() {
   return pose;
 }
 
-void GvrDevice::ResetPose() {
+void GvrDevice::ResetPose(VRServiceImpl* service) {
+  if (CheckAccessAllowed(service))
+    return;
+
   gvr::GvrApi* gvr_api = GetGvrApi();
   if (gvr_api)
     gvr_api->ResetTracking();
 }
 
-bool GvrDevice::RequestPresent(bool secure_origin) {
+bool GvrDevice::RequestPresent(VRServiceImpl* service, bool secure_origin) {
+  if (presenting_service_ != nullptr)
+    if (presenting_service_ != service)
+      return false;
+
+  // One service could present on several devices at the same time
+  // and different service could present on different devices the same time
+  if (presenting_service_ == nullptr)
+    presenting_service_ = service;
+
   secure_origin_ = secure_origin;
   if (delegate_)
     delegate_->SetWebVRSecureOrigin(secure_origin_);
-  return gvr_provider_->RequestPresent();
+
+  if (!gvr_provider_->RequestPresent()) {
+    return false;
+  }
+  return true;
 }
 
-void GvrDevice::ExitPresent() {
+void GvrDevice::ExitPresent(VRServiceImpl* service) {
+  if (IsPresentingService(service))
+    presenting_service_ = nullptr;
+
   gvr_provider_->ExitPresent();
+  OnExitPresent(service);
 }
 
-void GvrDevice::SubmitFrame(VRPosePtr pose) {
-  if (delegate_)
-    delegate_->SubmitWebVRFrame();
+void GvrDevice::SubmitFrame(VRServiceImpl* service, VRPosePtr pose) {
+  if (IsPresentingService(service)) {
+    if (delegate_)
+      delegate_->SubmitWebVRFrame();
+  }
 }
 
-void GvrDevice::UpdateLayerBounds(VRLayerBoundsPtr leftBounds,
+void GvrDevice::UpdateLayerBounds(VRServiceImpl* service,
+                                  VRLayerBoundsPtr leftBounds,
                                   VRLayerBoundsPtr rightBounds) {
-  if (!delegate_)
-    return;
-
-  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);
+  if (CheckAccessAllowed(service)) {
+    if (!delegate_)
+      return;
+
+    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);
+  }
 }
 
 void GvrDevice::SetDelegate(GvrDelegate* delegate) {
@@ -227,7 +256,7 @@ void GvrDevice::SetDelegate(GvrDelegate* delegate) {
   // Notify the clients that this device has changed
   if (delegate_) {
     delegate_->SetWebVRSecureOrigin(secure_origin_);
-    VRDeviceManager::GetInstance()->OnDeviceChanged(GetVRDevice());
+    this->OnDisplayChanged();
   }
 }
 
@@ -238,4 +267,37 @@ gvr::GvrApi* GvrDevice::GetGvrApi() {
   return delegate_->gvr_api();
 }
 
+void GvrDevice::OnDisplayChanged() {
+  VRDisplayPtr vr_device_info = GetVRDevice();
+  if (vr_device_info.is_null())
+    return;
+
+  vr_device_info->index = id();
+
+  for (const auto& service : display_services_)
+    service.second->OnDisplayChanged(vr_device_info.Clone());
+}
+
+void GvrDevice::OnExitPresent(VRServiceImpl* service) {
+  DisplayServiceMap::iterator it = display_services_.find(service);
+  if (it != display_services_.end())
+    it->second->OnExitPresent();
+}
+
+void GvrDevice::OnDisplayConnected() {
+  VRDisplayPtr vr_device_info = GetVRDevice();
+  if (vr_device_info.is_null())
+    return;
+
+  vr_device_info->index = id();
+
+  for (const auto& service : display_services_)
+    service.second->OnDisplayConnected(vr_device_info.Clone());
+}
+
+void GvrDevice::OnDisplayDisconnected() {
+  for (const auto& service : display_services_)
+    service.second->OnDisplayDisconnected();
+}
+
 }  // namespace device