Add support of vrdisplayconnect and vrdisplaydisconnect event

device/vr/android/gvr/gvr_device.h

Index: device/vr/android/gvr/gvr_device.h
diff --git a/device/vr/android/gvr/gvr_device.h b/device/vr/android/gvr/gvr_device.h
index ed70b84c39d7c3f017f056a60a6a618e94d96668..b7834b24035beb616b6cbe620a9dc1fb9e6bb289 100644
--- a/device/vr/android/gvr/gvr_device.h
+++ b/device/vr/android/gvr/gvr_device.h
@@ -28,10 +28,14 @@ class GvrDevice : public VRDevice {
   void SubmitFrame() override;
   void UpdateLayerBounds(VRLayerBoundsPtr leftBounds,
                          VRLayerBoundsPtr rightBounds) override;
+  virtual void PollEvents() override;
 
  private:
   GvrDelegate* delegate_;
 
+  bool isConnected_;
+  bool isConnectionStatusChanged_;

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

These values are no longer used and the PollEvents call is empty. With this
latest update we don't need any changes to gvr_device.h/cc, so let's just revert
those to files.

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

Done.

+
   DISALLOW_COPY_AND_ASSIGN(GvrDevice);
 };