Update from https://crrev.com/316786

base/memory/scoped_ptr.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Scopers help you manage ownership of a pointer, helping you easily manage a
 // pointer within a scope, and automatically destroying the pointer at the end
 // of a scope.  There are two main classes you will use, which correspond to the
 // operators new/delete and new[]/delete[].
 //
 // Example usage (scoped_ptr<T>):
@@ skipping 67 matching lines @@
 #define BASE_MEMORY_SCOPED_PTR_H_
 
 // This is an implementation designed to match the anticipated future TR2
 // implementation of the scoped_ptr class.
 
 #include <assert.h>
 #include <stddef.h>
 #include <stdlib.h>
 
 #include <algorithm>  // For std::swap().
+#include <iosfwd>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/move.h"
 #include "base/template_util.h"
 
 namespace base {
 
 namespace subtle {
 class RefCountedBase;
@@ skipping 480 matching lines @@
 }
 
 // A function to convert T* into scoped_ptr<T>
 // Doing e.g. make_scoped_ptr(new FooBarBaz<type>(arg)) is a shorter notation
 // for scoped_ptr<FooBarBaz<type> >(new FooBarBaz<type>(arg))
 template <typename T>
 scoped_ptr<T> make_scoped_ptr(T* ptr) {
   return scoped_ptr<T>(ptr);
 }
 
+template <typename T>
+std::ostream& operator<<(std::ostream& out, const scoped_ptr<T>& p) {
+  return out << p.get();
+}
+
 #endif  // BASE_MEMORY_SCOPED_PTR_H_