Move WebVR public headers into public/platform/modules/vr

public/platform/WebVRClient.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 WebVRClient_h
-#define WebVRClient_h
-
-#include "public/platform/WebCallbacks.h"
-#include "public/platform/WebVR.h"
-#include "public/platform/WebVector.h"
-
-namespace blink {
-
-// Success and failure callbacks for getDevices.
-typedef WebCallbacks<WebVector<blink::WebVRDevice>, void> WebVRGetDevicesCallback;
-
-// Client handling VR device communication for a given WebFrame.
-class WebVRClient {
-public:
-    virtual ~WebVRClient() { }
-
-    virtual void getDevices(WebVRGetDevicesCallback*) = 0;
-
-    virtual void getSensorState(unsigned index, blink::WebHMDSensorState& into) = 0;
-
-    virtual void resetSensor(unsigned index) = 0;
-};
-
-} // namespace blink
-
-#endif // WebVRClient_h