Revert "Adding Chrome-side WebVR interface and Cardboard implementation"

content/browser/vr/vr_device_provider.h

-// 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.
-
-#ifndef CONTENT_BROWSER_VR_VR_DEVICE_PROVIDER_H
-#define CONTENT_BROWSER_VR_VR_DEVICE_PROVIDER_H
-
-#include <vector>
-
-namespace content {
-
-class VRDevice;
-
-class VRDeviceProvider {
- public:
-  VRDeviceProvider() {}
-  virtual ~VRDeviceProvider() {}
-
-  virtual void GetDevices(std::vector<VRDevice*>& devices) = 0;
-
-  // If the VR API requires initialization that should happen here.
-  virtual void Initialize() = 0;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_VR_VR_DEVICE_PROVIDER_H