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..31f22a3901695e4daea447ba3cb3d56705a07b4b 100644
--- a/device/vr/android/gvr/gvr_device.h
+++ b/device/vr/android/gvr/gvr_device.h
@@ -28,10 +28,17 @@ class GvrDevice : public VRDevice {
   void SubmitFrame() override;
   void UpdateLayerBounds(VRLayerBoundsPtr leftBounds,
                          VRLayerBoundsPtr rightBounds) override;
+  virtual void PollEvents(VRClientDispatcher* client) override;
+
+  // Gvr connection/disconnection Status Handler

[mthiesse, 2016/09/10 20:58:34]

Style nit: Comments should end with a period.

+  void UpdateConnectionStatus(bool isConnected) override;
 
  private:
   GvrDelegate* delegate_;
 
+  bool isConnected_;
+  bool isConnectionStatusChanged_;
+
   DISALLOW_COPY_AND_ASSIGN(GvrDevice);
 };