turn off the electron beam

Change-Id: I335fb6719f1d5a3f1c6f37a046fd1c2c4ed2bbc6
diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
index 8369bb8..fa6a0c4 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
@@ -40,7 +40,11 @@
     // console managment
     void releaseScreen() const;
     void acquireScreen() const;
+    bool isScreenAcquired() const;
+
     bool canDraw() const;
+    void setCanDraw(bool canDraw);
+
 
 private:
     class DisplayEventThreadBase : public Thread {
@@ -89,6 +93,7 @@
 
     sp<DisplayEventThreadBase>  mDisplayEventThread;
     mutable int                 mCanDraw;
+    mutable int                 mScreenAcquired;
 };
 
 }; // namespace android