Revert "Fix a potential overflow in SortedListBSearch".

This reverts r21960.

R=jochen@chromium.org

Review URL: https://codereview.chromium.org/422853005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22636 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/list-inl.h

@@ -220,7 +220,7 @@ int SortedListBSearch(const List<T>& list, P cmp) {
   int low = 0;
   int high = list.length() - 1;
   while (low <= high) {
-    int mid = low + (high - low) / 2;
+    int mid = (low + high) / 2;
     T mid_elem = list[mid];
 
     if (cmp(&mid_elem) > 0) {