Reland of mojo VR interface simpified.

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(VRDeviceProvider* provider)
-    : provider_(provider), id_(next_id_) {
+    : presenting_service_(nullptr), provider_(provider), 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) {
+bool VRDevice::RequestPresent(VRServiceImpl* service, bool secure_origin) {
   return true;
 };
 
+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) {
+  ExitPresent(service);
+  displays_.erase(service);
+}
+
+bool VRDevice::IsAccessAllowed(VRServiceImpl* service) {
+  return (!presenting_service_ || presenting_service_ == service);
+}
+
+bool VRDevice::IsPresentingService(VRServiceImpl* service) {
+  return (presenting_service_ && presenting_service_ == service);
+}
+
+void VRDevice::OnDisplayChanged() {
+  mojom::VRDisplayInfoPtr vr_device_info = GetVRDevice();
+  if (vr_device_info.is_null())
+    return;
+
+  for (const auto& display : displays_) {
+    mojom::VRDisplayClient* client = display.second->client();
+    if (client)
+      client->OnDisplayChanged(vr_device_info.Clone());
+  }
+}
+
+void VRDevice::OnExitPresent(VRServiceImpl* service) {
+  DisplayClientMap::iterator it = displays_.find(service);
+  if (it != displays_.end()) {
+    mojom::VRDisplayClient* client = it->second->client();
+    if (client)
+      client->OnExitPresent();
+  }
+}
+
 }  // namespace device