Bug 996850 - Part 1: Don't show context menu for empty sites. r=lucasr

mobile/android/base/home/TopSitesGridItemView.java

@@ -107,6 +107,13 @@ public class TopSitesGridItemView extends RelativeLayout {
         return mIsPinned;
     }
 
+    /**
+     * @return true, if this view has no content to show.
+     */
+    public boolean isEmpty() {
+        return mIsEmpty;
+    }
+
     /**
      * @param title The title for this view.
      */

mobile/android/base/home/TopSitesGridView.java

@@ -125,7 +125,8 @@ public class TopSitesGridView extends GridView {
             public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
                 Cursor cursor = (Cursor) parent.getItemAtPosition(position);
 
-                if (cursor == null) {
+                TopSitesGridItemView gridView = (TopSitesGridItemView) view;
+                if (cursor == null || gridView.isEmpty()) {
                     mContextMenuInfo = null;
                     return false;
                 }