Fix |Array| and iterator_util.h's Iterator operator->() behavior

mojo/public/cpp/bindings/array.h

Index: mojo/public/cpp/bindings/array.h
diff --git a/mojo/public/cpp/bindings/array.h b/mojo/public/cpp/bindings/array.h
index e1efc1830cc7c025139b0b20b0e9b310c86a0f36..e765bb1a43eed4fb26ff53fcc346a7d5489dd840 100644
--- a/mojo/public/cpp/bindings/array.h
+++ b/mojo/public/cpp/bindings/array.h
@@ -197,7 +197,7 @@ class Array {
     }
     bool operator!=(const Iterator& o) const { return !(*this == o); }
     RefType operator*() const { return arr_->at(pos_); }
-    RefType operator->() const { return operator*(); }
+    T* operator->() const { return &arr_->at(pos_); }
 
     // The following satisfy RandomAccessIterator:
     Iterator& operator+=(difference_type dist) {