Plumbing through more WebVR presentation code

device/vr/vr_device.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 DEVICE_VR_VR_DEVICE_H
 #define DEVICE_VR_VR_DEVICE_H
 
 #include "base/macros.h"
 #include "device/vr/vr_export.h"
 #include "device/vr/vr_service.mojom.h"
@@ skipping 17 matching lines @@
   DEVICE_VR_EXPORT explicit VRDevice(VRDeviceProvider* provider);
   DEVICE_VR_EXPORT virtual ~VRDevice();
 
   DEVICE_VR_EXPORT VRDeviceProvider* provider() const { return provider_; }
   DEVICE_VR_EXPORT unsigned int id() const { return id_; }
 
   virtual VRDisplayPtr GetVRDevice() = 0;
   virtual VRPosePtr GetPose() = 0;
   virtual void ResetPose() = 0;
 
+  virtual void RequestPresent(){};
+  virtual void ExitPresent(){};
+
+  virtual void SubmitFrame(){};
+  virtual void UpdateLayerBounds(VRLayerBoundsPtr leftBounds,
+                                 VRLayerBoundsPtr rightBounds){};
+
  private:
   VRDeviceProvider* provider_;
   unsigned int id_;
 
   static unsigned int next_id_;
 
   DISALLOW_COPY_AND_ASSIGN(VRDevice);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_VR_VR_DEVICE_H