Migrate WebVR Cardboard implementation to GVR

device/vr/android/google_vr/google_vr_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/google_vr/google_vr_device_provider.h"
+
+#include "base/android/context_utils.h"
+#include "base/android/jni_android.h"
+#include "base/android/jni_utils.h"
+#include "base/android/scoped_java_ref.h"
+#include "device/vr/android/google_vr/google_vr_device.h"
+#include "jni/GoogleVRDeviceProvider_jni.h"
+
+using base::android::AttachCurrentThread;
+using base::android::GetApplicationContext;
+using base::android::GetClassLoader;
+
+namespace device {
+
+GoogleVRDeviceProvider::GoogleVRDeviceProvider() : VRDeviceProvider() {}
+
+GoogleVRDeviceProvider::~GoogleVRDeviceProvider() {
+  if (gvr_) {
+    JNIEnv* env = AttachCurrentThread();
+    Java_GoogleVRDeviceProvider_shutdown(env, j_device_.obj());
+  }
+}
+
+void GoogleVRDeviceProvider::GetDevices(std::vector<VRDevice*>* devices) {
+  Initialize();
+
+  if (!vr_device_ && gvr_) {
+    vr_device_.reset(new GoogleVRDevice(this, gvr_.get()));
+    devices->push_back(vr_device_.get());
+  }
+}
+
+void GoogleVRDeviceProvider::Initialize() {
+  if (!gvr_) {
+    JNIEnv* env = AttachCurrentThread();
+
+    // Java Route.
+    j_device_.Reset(
+        Java_GoogleVRDeviceProvider_create(env, GetApplicationContext()));
+    jlong gvr_api =
+        Java_GoogleVRDeviceProvider_getNativeContext(env, j_device_.obj());
+    gvr_ = gvr::GvrApi::WrapNonOwned(reinterpret_cast<gvr_context*>(gvr_api));
+  }
+}
+
+}  // namespace device