Adding Chrome-side WebVR interface

content/browser/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 "content/browser/vr/vr_device.h"
+#include "content/browser/vr/vr_device_provider.h"
+
+namespace content {
+
+unsigned int VRDevice::next_id_ = 1;
+
+VRDevice::VRDevice(VRDeviceProvider* provider)
+    : 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() {
+}
+
+}  // namespace content