Migrate WebVR Cardboard implementation to GVR

device/vr/android/cardboard/cardboard_vr_device_provider.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/android/cardboard/cardboard_vr_device_provider.h"
-
-#include "device/vr/android/cardboard/cardboard_vr_device.h"
-
-namespace device {
-
-CardboardVRDeviceProvider::CardboardVRDeviceProvider() : VRDeviceProvider() {}
-
-CardboardVRDeviceProvider::~CardboardVRDeviceProvider() {}
-
-void CardboardVRDeviceProvider::GetDevices(std::vector<VRDevice*>* devices) {
-  if (!cardboard_device_) {
-    cardboard_device_.reset(new CardboardVRDevice(this));
-  }
-
-  devices->push_back(cardboard_device_.get());
-}
-
-void CardboardVRDeviceProvider::Initialize() {
-  // No initialization needed for Cardboard devices.
-}
-
-}  // namespace device