Adding WebVR interface to Blink

Source/modules/vr/PositionSensorVRDevice.h

Index: Source/modules/vr/PositionSensorVRDevice.h
diff --git a/Source/modules/vr/PositionSensorVRDevice.h b/Source/modules/vr/PositionSensorVRDevice.h
new file mode 100644
index 0000000000000000000000000000000000000000..4a7f7cdfad453533cc261c2f2469d132e676645f
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+++ b/Source/modules/vr/PositionSensorVRDevice.h
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+// 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 PositionSensorVRDevice_h
+#define PositionSensorVRDevice_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "modules/vr/NavigatorVRDevice.h"
+#include "modules/vr/VRDevice.h"
+#include "modules/vr/VRPositionState.h"
+#include "platform/heap/Handle.h"
+#include "wtf/Forward.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class PositionSensorVRDevice final : public VRDevice {
+    DEFINE_WRAPPERTYPEINFO();
+public:
+    explicit PositionSensorVRDevice(VRHardwareUnit*);
+
+    VRPositionState* getState();
+    VRPositionState* getImmediateState();
+    void resetSensor();
+
+    virtual void trace(Visitor*) override;
+};
+
+} // namespace blink
+
+#endif // PositionSensorVRDevice_h