Migrate WebVR Cardboard implementation to GVR

device/vr/android/gvr/gvr_api_manager.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_api_manager.h"
+
+namespace device {
+
+namespace {
+GvrApiManager* g_gvr_api_manager = nullptr;
+}
+
+GvrApiManager* GvrApiManager::GetInstance() {
+  if (!g_gvr_api_manager)
+    g_gvr_api_manager = new GvrApiManager();
+  return g_gvr_api_manager;
+}
+
+GvrApiManager::GvrApiManager() {}
+
+GvrApiManager::~GvrApiManager() {}
+
+void GvrApiManager::AddClient(GvrApiManagerClient* client) {
+  clients_.push_back(client);
+
+  if (gvr_api_)
+    client->OnGvrApiInitialized(gvr_api_.get());
+}
+
+void GvrApiManager::RemoveClient(GvrApiManagerClient* client) {
+  clients_.erase(std::remove(clients_.begin(), clients_.end(), client),
+                 clients_.end());
+}
+
+void GvrApiManager::Initialize(gvr_context* context) {
+  gvr_api_ = gvr::GvrApi::WrapNonOwned(context);
+
+  for (const auto& client : clients_)
+    client->OnGvrApiInitialized(gvr_api_.get());
+}
+
+void GvrApiManager::Shutdown() {
+  if (!gvr_api_)
+    return;
+
+  gvr_api_.reset(nullptr);
+
+  for (const auto& client : clients_)
+    client->OnGvrApiShutdown();
+}
+
+gvr::GvrApi* GvrApiManager::gvr_api() {
+  return gvr_api_.get();
+}
+
+}  // namespace device