Add support of vrdisplayconnect and vrdisplaydisconnect event

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_client_dispatcher.h"
 #include "device/vr/vr_export.h"
 #include "device/vr/vr_service.mojom.h"
 
 namespace blink {
 struct WebHMDSensorState;
 }
 
 namespace ui {
 class BaseWindow;
 }
 
 namespace device {
 
 class VRDeviceProvider;
 
 const unsigned int VR_DEVICE_LAST_ID = 0xFFFFFFFF;
 
 class VRDevice {
  public:
   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 PollEvents() = 0;

[bajones, 2016/09/12 01:36:15]

This is another file who's changes are no longer necessary.

[shaobo.yan, 2016/09/12 01:59:01]

Done.

 
   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