Improve feedback during spring loaded mode

- Uniformly scale the outlines of items on the screens to match the correct grid size as closely as possible
- Fix bug with drag + drop that was reporting dragged items' height wrong
- Remove unused code
diff --git a/src/com/android/launcher2/CellLayout.java b/src/com/android/launcher2/CellLayout.java
index c105c36..de75fd3 100644
--- a/src/com/android/launcher2/CellLayout.java
+++ b/src/com/android/launcher2/CellLayout.java
@@ -1245,6 +1245,13 @@
         return result;
     }
 
+    public int[] cellSpansToSize(int hSpans, int vSpans) {
+        int[] size = new int[2];
+        size[0] = hSpans * mCellWidth + (hSpans - 1) * mWidthGap;
+        size[1] = vSpans * mCellHeight + (vSpans - 1) * mHeightGap;
+        return size;
+    }
+
     /**
      * Calculate the grid spans needed to fit given item
      */