Add "reference" and "const_reference" typedefs to ScopedVector to enable it to support std::back_in…

base/memory/scoped_vector.h

Index: base/memory/scoped_vector.h
===================================================================
--- base/memory/scoped_vector.h	(revision 127613)
+++ base/memory/scoped_vector.h	(working copy)
@@ -24,6 +24,8 @@
   typedef typename std::vector<T*>::reverse_iterator reverse_iterator;
   typedef typename std::vector<T*>::const_reverse_iterator
       const_reverse_iterator;
+  typedef typename std::vector<T*>::reference reference;
+  typedef typename std::vector<T*>::const_reference const_reference;
 
   ScopedVector() {}
   ~ScopedVector() { reset(); }