Bug 824474: Proper cleanup of tabs-tray while hiding. [r=mfinkle]

--HG--
extra : rebase_source : 61bf7bde07dc4cfad77acd656a60c88c4d329d8a

mobile/android/base/TabsPanel.java

@@ -410,6 +410,9 @@ public class TabsPanel extends TabHost
             mVisible = false;
             mPopupMenu.dismiss();
             dispatchLayoutChange(0, 0);
+
+            mPanel.hide();
+            mPanel = null;
         }
     }
 

mobile/android/base/TabsTray.java

@@ -222,7 +222,7 @@ public class TabsTray extends ListView
         }
 
         private void removeTab(Tab tab) {
-            if (tab.isPrivate() == mIsPrivate) {
+            if (tab.isPrivate() == mIsPrivate && mTabs != null) {
                 mTabs.remove(tab);
                 notifyDataSetChanged(); // Be sure to call this whenever mTabs changes.
             }