cc: Convert non-const reference arguments to pointers.

cc/base/scoped_ptr_algorithm.h

Index: cc/base/scoped_ptr_algorithm.h
diff --git a/cc/base/scoped_ptr_algorithm.h b/cc/base/scoped_ptr_algorithm.h
index ad2f918f3bda31a6bbcc0721b227f8956ba0df07..79f4eee49e6d264e0a913280024d1c024b9cf9eb 100644
--- a/cc/base/scoped_ptr_algorithm.h
+++ b/cc/base/scoped_ptr_algorithm.h
@@ -11,14 +11,14 @@ namespace cc {
 // assignment to their iterators.
 template <class ForwardIterator, class Predicate, class ScopedContainer>
 ForwardIterator remove_if(
-    ScopedContainer& container,
+    ScopedContainer* container,
     ForwardIterator first,
     ForwardIterator last,
     Predicate predicate) {
   ForwardIterator result = first;
   for (; first != last; ++first) {
     if (!predicate(*first)) {
-      container.swap(first, result);
+      container->swap(first, result);
       ++result;
     }
   }