Adding WebVR interface to Blink

Source/modules/vr/VRHardwareUnit.h

Index: Source/modules/vr/VRHardwareUnit.h
diff --git a/Source/modules/vr/VRHardwareUnit.h b/Source/modules/vr/VRHardwareUnit.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 VRHardwareUnit_h
+#define VRHardwareUnit_h
+
+#include "modules/vr/VRFieldOfView.h"
+#include "modules/vr/VRPositionState.h"
+#include "platform/heap/Handle.h"
+#include "wtf/text/WTFString.h"
+
+namespace blink {
+
+class VRDevice;
+class HMDVRDevice;
+class NavigatorVRDevice;
+class PositionSensorVRDevice;
+
+enum VREye {
+    VREyeLeft,
+    VREyeRight,
+    VREyeNone,
+};
+
+class VRHardwareUnit : public GarbageCollectedFinalized<VRHardwareUnit> {
+public:
+    VRHardwareUnit();
+    virtual ~VRHardwareUnit();
+
+    void updateFromWebVRDevice(const WebVRDevice&);
+
+    void addDevicesToVector(HeapVector<Member<VRDevice>>&);
+
+    virtual unsigned index() const { return m_index; }
+    const String& hardwareUnitId() const { return m_hardwareUnitId; }
+
+    unsigned frameIndex() const { return m_frameIndex; }
+
+    VRPositionState* getPositionState();
+
+    void setFieldOfView(VREye, VRFieldOfView*);
+    VRFieldOfView* getCurrentEyeFieldOfView(VREye) const;
+
+    HMDVRDevice* hmd() const { return m_hmd; }
+    PositionSensorVRDevice* positionSensor() const { return m_positionSensor; }
+
+    virtual void trace(Visitor*);
+
+private:
+    unsigned m_index;
+    String m_hardwareUnitId;
+
+    unsigned m_frameIndex;
+
+    Member<VRPositionState> m_positionState;
+    Member<VRFieldOfView> m_currentFOVLeft;
+    Member<VRFieldOfView> m_currentFOVRight;
+
+    // Device types
+    Member<HMDVRDevice> m_hmd;
+    Member<PositionSensorVRDevice> m_positionSensor;
+};
+
+} // namespace blink
+
+#endif // VRHardwareUnit_h