Revert of Migrate WebVR Cardboard implementation to GVR

device/vr/android/gvr/gvr_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/gvr/gvr_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/gvr/gvr_device.h"
-#include "jni/GvrDeviceProvider_jni.h"
-
-using base::android::AttachCurrentThread;
-using base::android::GetApplicationContext;
-
-namespace device {
-
-GvrDeviceProvider::GvrDeviceProvider() : VRDeviceProvider() {
-  GvrApiManager::GetInstance()->AddClient(this);
-}
-
-GvrDeviceProvider::~GvrDeviceProvider() {
-  // TODO: This should eventually be handled by an actual GvrLayout instance in
-  // the view tree.
-  GvrApiManager::GetInstance()->Shutdown();
-  if (!j_device_.is_null()) {
-    JNIEnv* env = AttachCurrentThread();
-    Java_GvrDeviceProvider_shutdown(env, j_device_.obj());
-  }
-
-  GvrApiManager::GetInstance()->RemoveClient(this);
-}
-
-void GvrDeviceProvider::GetDevices(std::vector<VRDevice*>* devices) {
-  Initialize();
-
-  if (vr_device_)
-    devices->push_back(vr_device_.get());
-}
-
-void GvrDeviceProvider::Initialize() {
-  // TODO: This should eventually be handled by an actual GvrLayout instance in
-  // the view tree.
-  if (j_device_.is_null()) {
-    JNIEnv* env = AttachCurrentThread();
-
-    j_device_.Reset(
-        Java_GvrDeviceProvider_create(env, GetApplicationContext()));
-    jlong gvr_api =
-        Java_GvrDeviceProvider_getNativeContext(env, j_device_.obj());
-
-    if (!gvr_api)
-      return;
-
-    GvrApiManager::GetInstance()->Initialize(
-        reinterpret_cast<gvr_context*>(gvr_api));
-  }
-}
-
-void GvrDeviceProvider::OnGvrApiInitialized(gvr::GvrApi* gvr_api) {
-  if (!vr_device_)
-    vr_device_.reset(new GvrDevice(this, gvr_api));
-
-  // Should fire a vrdisplayconnected event here.
-}
-
-void GvrDeviceProvider::OnGvrApiShutdown() {
-  // Nothing to do here just yet. Eventually want to shut down the VRDevice
-}
-
-}  // namespace device