Revert 86065 - Move sorting logic from table to list.

chrome/browser/resources/shared/js/cr/ui/list_single_selection_model.js

Index: chrome/browser/resources/shared/js/cr/ui/list_single_selection_model.js
===================================================================
--- chrome/browser/resources/shared/js/cr/ui/list_single_selection_model.js	(revision 86337)
+++ chrome/browser/resources/shared/js/cr/ui/list_single_selection_model.js	(working copy)
@@ -197,25 +197,35 @@
      * @param {!Array.<number>} permutation The reordering permutation.
      */
     adjustToReordering: function(permutation) {
-      if (this.leadIndex != -1)
-        this.leadIndex = permutation[this.leadIndex];
-
-      var oldSelectedIndex = this.selectedIndex;
-      if (oldSelectedIndex != -1) {
-        this.selectedIndex = permutation[oldSelectedIndex];
-      }
     },
 
     /**
-     * Adjusts selection model length. This is only used when data model is
-     * set, so it is safe to clear() first.
-     * This should not be used for dataModel updates, use adjustToReordering
-     * instead.
-     * @param {number} length New selection model length.
+     * Adjust the selection by adding or removing a certain numbers of items.
+     * This should be called by the owner of the selection model as items are
+     * added and removed from the underlying data model.
+     * @param {number} index The index of the first change.
+     * @param {number} itemsRemoved Number of items removed.
+     * @param {number} itemsAdded Number of items added.
      */
-    adjustLength: function(length) {
-      this.clear();
-      this.length_ = length;
+    adjust: function(index, itemsRemoved, itemsAdded) {
+      function getNewAdjustedIndex(i) {
+        if (i >= index && i < index + itemsRemoved) {
+          return index;
+        } else if (i >= index) {
+          return i + itemsAdded - itemsRemoved;
+        }
+        return i;
+      }
+
+      this.length_ += itemsAdded - itemsRemoved;
+
+      var i = this.selectedIndex;
+      if (itemsRemoved > 0 && i >= index && i < index + itemsRemoved)
+        this.selectedIndex = -1;
+      else if (i >= index)
+        this.selectedIndex = i + itemsAdded - itemsRemoved;
+
+      this.leadIndex = getNewAdjustedIndex(this.leadIndex);
     }
   };