fix action appearing after cab

    Bug: 3426763
    Due to a bug in frameworks, the action bar re-appears after being hidden
    this CL works around the bug by posting the hide

Change-Id: I253bdaa3a5a76ffe82e665b915d8a9f7101ff7c6
diff --git a/src/com/android/browser/BaseUi.java b/src/com/android/browser/BaseUi.java
index c01ec06..b108fd8 100644
--- a/src/com/android/browser/BaseUi.java
+++ b/src/com/android/browser/BaseUi.java
@@ -468,6 +468,10 @@
         mContentView.addView(mComboView, COVER_SCREEN_PARAMS);
     }
 
+    public boolean isComboViewShowing() {
+        return (mComboView != null);
+    }
+
     /**
      * dismiss the ComboPage
      */